题目内容
33.(2012 陕西，26) —Sam,come downstairs,please. I need your help.
—Sorry,mum. I on the phone.
A. am talking B. talked C. was talking D. have talked
33. A
33. A
句意: Sam,请来楼下，我需要你的帮助。对不起，妈妈,我正在打电话。本题考查现在进行时的用法。根据题意可知 应用现在进行时，现在进行时的结构为am/is/are + doing,故答案为A.
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