I’m afraid it’s going to rain this afternoon. Look at the dark and cloudy sky.A. N

问题补充：

--- I’m afraid it’s going to rain this afternoon.

--- Look at the dark and cloudy sky.

A. Not really.

B. Is it?

C. Why not?

D. I guess so.

答案：

A. Not really.

B. Is it?

C. Why not?

(答案→)D. I guess so.

解析：考查交际用语。A不是真的这样；B是这样吗？C为什么不？D我猜是这样。句意：—恐怕今天下午要下雨了。—我猜也是这样，看看天上的乌云。根据句意说明这两个人意见一致。故D正确。