1 --- What do you think of _____opening ceremony of the Guangzhou Asian games?
----It was _____magical and memorable sight.
A. the; the B. a; the C. a ; a D. the; a
2 The best way to prevent the air polluting _____ , but the sky is still not clear.
A is used B are used C has been used D have been used
3 I can’t go out with these clothes_____
A wash B washing C to wash D washed
