1 . ______________ (大约) 20% of teenagers say they have tried skipping meals to control their weight. (根据汉语提示单词拼写)

2 . We do eye exercises ________ a day to protect our eyes. (two) (所给词的适当形式填空)

3 . It was then that I realised her seat was empty!
译文： __________我才意识到她的座位是空的!

4 . Since after-class activities will not ________(mere) make your school life colorful but also improve your learning, why not take an active part in them? (所给词的适当形式填空)

5 . Having given _______ some national secrets to the enemy, the man was sentenced to prison. (用适当的词填空)

6 . There was water everywhere, but we couldn’t drink any of it o________ we’d get really sick. （根据首字母单词拼写）

7 . When studying a______, everybody may experience culture shock.(根据首字母单词拼写)

9 . The volunteers ________ (定期) contact with the community to help old people deal with tough problems in life. (根据汉语提示单词拼写)

10 . Give her some courage; ________,(因此) she would not be so passive. （根据汉语提示单词拼写）