所给的四个选项中选择最佳答案

I can't decide which sweater ________.

[　　]

A．buy　　　    B．buying

C．to buy　　　  D．bought

根据对话内容, 选择恰当的句子补全对话. 每空1分. A. Do you like woolen sweaters or cotton ones B. Here are sweaters for men. C. It's great. D. But I'm afraid it costs too much. E. But the color is too dark.

A: Good morning, what can I do for you, sir B: I'd like a sweater for myself. A: This way, please. _

B: I can't decide which sweater to buy!A: Let me help!_ B: Let me have a look at the woolen ones, please.

A: No hurry!Please take your time!B: I like this one. _ A: What about this one

B: _ But it's not thick enough. A: How about the blue one It's thicker.

B: I like it. _ A: I'm afraid you have to ask your wife to decide. B: Maybe you are right.