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

A．To enjoy

B．Enjoying

C．Enjoy

D．To have enjoyed

2 . The teacher decided to a ________ a new approach to get all the students involved. (根据首字母单词拼写)

3 . Only with the greatest of luck did he manage to e____ from the rising flood waters. (根据首字母单词拼写)

4 . We knew there was little hope for the brothers but we ________ (竭尽全力)save them. (根据汉语提示完成句子)

5 . I forgot to __________(提醒) him of the time for the interview.

6 . During the Warring States Period, more walls were put up to d______ the borders of different kingdoms.(根据首字母单词拼写)

7 . What you should do is to keep on and never __________ __________(丧失信心). (根据汉语提示完成句子)

8 . I had asked everyone to s_____________   questions in advance of the meeting.(根据首字母单词拼写)

9 . We have to p__________ the sports meeting until next week because of the heavy rain. (根据首字母单词拼写)

10 . As a freshman in senior high school, there is a lot to __________ (探索). (根据汉语提示单词拼写)