1 . It took years of work ________(reduce) the industrial pollution and clean the water.（所给词的适当形式填空）

2 . _________ the convenience of online payment, many old people started to use smart phones.

A．To enjoy

B．Enjoying

C．Enjoy

D．To have enjoyed

3 . After all his hard work, he now needs only two credit hours to_____________（毕业）. (根据汉语提示单词拼写)

4 . He passionately desired ________ (continue) his career. (所给词的适当形式填空)

5 . Some parents are just so protective that they want to s__________their kids from every kind of danger real or imagined. (根据首字母单词拼写)

6 . We are supposed to ________ ________ ________(对......负责) our life. （根据汉语提示完成句子）

7 . Responsible teachers tend to try various approaches to _________ (确保) that their students gain a sense of achievement in studies. (根据汉语提示单词拼写)

8 . It is impolite to ______(打断) when someone is talking. (根据汉语提示单词拼写)

9 . Many new couples are eager to________(收养) the children losing their parents in the earthquake. （根据汉语提示单词拼写）

10 . __________________________(坦白地说), Tom is not confident enough for this job. (根据汉语提示完成句子)