---- Could I have a word with you?---- Sorry I am busy . Shall we do it later?A. at the m

问题补充：

---- Could I have a word with you?

---- Sorry, I am busy . Shall we do it later?

A. at the moment

B. for a moment

C. on the moment

D. in a moment

答案：

(答案→)A. at the moment

B. for a moment

C. on the moment

D. in a moment

解析：本题考查表示时间的介词短语, at the moment意思是:当时; for a moment意思是:一会;on the moment和in a moment意思是: 立刻,马上。