2 . The book ___________（refer）to by the specialist at the meeting deals with Asian problems. (所给词的适当形式填空)

3 . ---What are those on the wall ?
--- Some photos ________ in Tokyo .

A．are taken

B．taken

C．took

D．were taken

4 . Busily ________ (employ) in cleaning his shoes, he didn't notice my coming.

5 . __________ (expose) to Chinese culture in person, you will have a better understanding of it.

6 . ________ (face) with the threat of water shortages, Beijing and Shanghai are taking effective measures to save water and protect water resources.

7 . E______(暴露）to so many ads,we are always persuaded to buy something we don’t really need.(根据汉语提示单词拼写)

8 . You should keep yourself __________________(inform)of what your son is doing. （用单词适当形式填空）

9 . We finally managed to make the customers _____________(convince) of the quality of the vehicle. (所给词的适当形式填空）

10 . He didn’t keep on asking me the time any longer as he had had his watch ____.

A．to repair

B．repairing

C．repair

D．repaired