①Doing volunteer work is likely to prevent students from making academic progress because they will have to spend their precious time on it. This can make them too tired to study.

②It will be difficult for students to have enough rest if they are doing volunteer work. Today students are becoming busier than they use to be. They should have more room to feel relaxed and refreshed.

携帯電話と同じです。

増える：①英語を勉強している人が増えている、②旅行に役立つサービス、③海外の情報がすぐ手には入るようになった

①Recently the number of people studying English has been gradually increasing in Japan. As a result, more and more Japanese people will travel abroad because it is one of the best ways to practice speaking English.

②Recently, there are a lot of good services that help people travel abroad comfortably. For instance, once you pay the fee for the service, you do not have to take the trouble to make plans and book hotels by yourself.

book ＝ ～を予約する

③A lot of information is accessible today due to development of the Internet, and more and more people in Japan are becoming interested in foreign cultures. Since this trend is likely to continue, more people will travel abroad.

減る：①世界は危険になってきている、②国内で海外の文化に触れられるようになってきた、③国内で英語を話す機会が増えた

①People have become aware of the danger of travelling abroad. In fact, the world is getting more and more dangerous because of terrorism. It is much safer to stay in Japan than going abroad.

②Recently we are surrounded by a lot of different cultures even in Japan because of the increase in the number of tourists from other countries. People can enjoy interacting with foreigners without travelling abroad.

increase in ～ ＝ 【名】～の増加

the number of～ ＝ ～の数

③Some people are travelling abroad to seek for chances to speak English, but going overseas may be no longer necessary. In Japan, the number of foreigners has been increasing, which means there will be more opportunities to speak English in Japan.

賛成：①もういくつかロボットは現れている、②たくさんの会社が取り入れる

①Many types of robots are emerging little by little. In fact some of them are already working to help people in many places such as factories and shopping malls. It is not long before they become common in our daily lives.

It is not long before～ ＝ ～までは長くない→～はすぐだ

②Robots have surprisingly become common in many workplaces. They are much better at doing simple and boring tasks than human beings. Actually, people are being replaced with robots in a number of factories. 

surprisingly ＝ 驚くほどに、意外なほど

反対：①コストが高い、②職が減るのを防ぐために普及を妨げる可能性あり

①Although robots are very helpful, they are too expensive to be common among ordinary people. Only a handful of rich people and big companies can afford to get one. There is still a long way to go to reduce the production cost.

②The government may prevent robots from being widely used because they can deprive people of their jobs. It is said that more than 50% of people's jobs can be done by robots. In order to prevent this, robots are likely to be regulated.

be widely used ＝ 幅広く使われている

賛成：①たくさんの女性が働いている、②産休も取りやすい

①Today a number of women are working just as men do. Female employees are also taking the same responsibility as male workers do. These are the evidence that women have much more opportunities to work than they used to.

②Recently it has become common for female workers to take maternity leave. A decade ago there was no choice but to give up working for giving birth and raising their baby. However, most women are now choosing to continue to work after a delivery.

反対：①給与が低い、②産後の職場の復帰率、③専業主婦が多い

①Female workers tend to be paid less compared to male workers in many workplaces, which is unfair. Something needs to be done to improve the situation so that women and men can work equally.

②The number of women returning to work after giving birth is relatively small. In Japan It is normally not fathers but mothers that are responsible for raising their child. This makes it hard for mothers to get back to work.

③There are so many housewives in Japan.  In contrast, there are so few male homemakers. This is the evidence that women can hardly get the same opportunities to work as men do.

男の人の立場から書くのもおもしろいかもしれません。例えば、「主夫は少ない」ということや、男はたくさん稼ぐことを求められるなどを中心に。

賛成：①引越ししやすい、②管理が楽

①Renting an partment allows people to move away to a different place freely when they get bored of where they are. Being able to choose the place that they want to live in any time is wonderful.

②Renting an apartment can make life easier than having your own house. It will cost a lot to repair your house when it gets old. On the other hand, it is not you but the landlord who has to pay to repair your place when it gets old.

landlord ＝ 大家さん、landlady ＝ 女の大家さん

反対：①隣人に気を使う必要あり

You cannot avoid caring about your next door neighbors if you are renting your place. This can be rather stressful because you always have to be careful not to bother them.

田舎：①ストレスが少なく快適、②空気がきれい

①living in a rural area is more comfortable than living in a big city. There are not any crowded places that can be stressful like Tokyo. Apparently people are under less pressure than those who live in cities.

②You can enjoy fresh air if you live in a rural area, which is almost impossible for those who live in big cities to experience (on a daily basis). Fresh air makes you refreshed anytime. This is also good for your health.

on a daily basis ＝ 毎日(の頻度で)

on a weekly basis ＝ 毎週(の頻度で)

on a regular basis ＝ regularly ＝定期的に

都会：①便利&田舎は不便、②たくさんの人に出会える

①Living in a big city is very convenient. You can easily get access to whatever you need. In contrast, living in a rural area can be extremely inconvenient once you have got used to a big city.

once～ ＝ 一度～すると

②If you live in a big city, there are more chances of meeting new people that you will never meet in rural areas. Interacting with them will inspire you and broaden your ways of thinking. 

学生のボランティアの賛成理由を、「学校→田舎」「ボランティア活動→都会」に変えて使い回しています。気付きました？

減る：①スマホの普及、②ネットニュース

①The number of people who read newspaper has been gradually declining. This is because martphones are widely used recently to get information instead of newspaper. This trend is most likely to continue. 

decline ＝ go down

②Recently a large number of pieces of information are available on the Internet. In fact all of the news that appear on newspaper can be found online. Because of this, more and more people will leave their newspaper.

information は不可算名詞です。ひとつと言いたければ、a piece of information, という風になります。

たくさんの情報は a lot of information でいいんですが、表現に幅を持たせるために敢えて、a large number of pieces of information と大袈裟にくどい書き方をしています。

減らない：①情報がたくさん得られる

①Newspaper allows people to get a lot of information that they need to know. Although you can see the news online as well, newspaper is more useful because you do not need to search for information by yourself.

これは減るの立場のほうが圧倒的に書きやすいし、将来は確実に新聞読む人は減ります。