1 . At present, the workers ________(build) a new bridge where the cross-river traffic is heavy. （所给词的适当形式填空）

2 . The young man performed as if he _________ (be) a woman on the stage. (所给词的适当形式填空)

3 . She loves the boy as if she ________(be) his mother. (所给词的适当形式填空）

4 . It is not Betty but you that ________ (blame) for the accident. (所给词的适当形式填空）

5 . He is a little boy, but he ________ (behave) as if he was an adult. （所给词的适当形式填空）

6 . More Chinese senior citizens ________ (become) active users of WeChat in recent years, according to a recent study. （所给词的适当形式填空）

7 . There is no point ________ (base) the new company in New York. （所给词的适当形式填空）

8 . The young man, when questioned why he ________(break) the law, just looked at the policeman and said nothing. (所给词的适当形式填空）

9 . The Great Wall of China is the longest man-made structure ever ________ (build) （所给词的适当形式填空）

10 . The findings might help people learn how to influence thoughts and ________ (behave) of others. （所给词的适当形式填空）