1 . Research has d_________(展示;说明) that babies can recognize their mothers’ voice very soon after birth. (根据中英文提示单词拼写)

2 . He ____ articles for our wall-newspaper these three years, and he _____ about forty articles.

A．has been writing, has written	B．has been writing, wrote
C．is writing, has been writing	D．has written, has written

3 . Recent years have w________ (见证) a growing social mobility. (根据中英文提示填空)

4 . Peter is the only one of the brightest students who _____ his degree?

A．have received

B．has received

C．had received

D．receiving

5 . How silly I am! Once again, I have c_________ you with your twin sister. (根据首字母单词拼写)

6 . In the past few years, it has ________ great changes in economy, politics and culture. (根据句意填空)

8 . You have________ (使参加) me in a great deal of extra work. (根据汉语提示拼写单词)

9 . Tony’s dream has ______ _____(实现). He is now a famous writer around the world. (根据汉语提示完成句子)

10 . I have ________________ (搜索到) the book you want in a shop near the station. (根据汉语提示补全句子)