1 . ________________is important for you that we should study hard . （所给词的适当形式填空）

2 . Spending too much time online is unhealthy and makes ________ very difficult to focus on other things in life and some students even become addicted to the Internet and cannot concentrate on school and family life. (用适当的词填空)

3 . However, the high speed train has made______ much more convenient for them to go back home. (用适当的词填空)

4 . Light pollution not only damages our vision health but also makes __________ difficult for us to sleep at night. (用适当的词填空)

5 . When we miss a night’s sleep, we find ________harder the next day to concentrate on learning new information. (用适当的词填空)

6 . I would appreciate ________ if you could let me know in advance whether you will come or not. (用适当的词填空)

7 . I find________ hard to concentrate on my studies with some people having small talks around me.(用适当的词填空)

8 . ______________ is obvious that our earth is suffering serious damage because of improper (不恰当的) human activities. （用适当的词填空）

9 . ________ is not surprising that he decided to stay for another year in the village school. (用适当的词填空)

10 . The young woman found ________ difficult to learn a second language at university. (用适当的词填空)