补全对话
从方框中选择最佳选项完成对话，有两项多余
a. Yes!
b. The keys? They're on the table.
c. No, they aren't.
d. How about my books?
e. It's under the desk.
f. Where are they?
g. Thank you very much.
A: Hi, Susan! My keys（钥匙） are lost（丢失）. ____
B: Are they on the table?
A:____
B: En. . . Are they in your bag?
A: But where is my bag?
B:____
A:____They are here. But there aren't any books in my bag.
B: Ha- ha. Are they lost, too?
A: Oh, no.
B: Look! They are on the shelf (架子).
A:____
B: Not at all.
