Question

 -- ________  your homework yet?

-- Not yet. I _______ it.

A. Have you done; am doing                          B. Did you do; am doing

C. Have you done; did                                     D. Did you do; did

 

Answer 1

【答案】

A               

【解析】             

试题分析：考查动词时态。句意 你做完作业了吗？没有，我正在做。haven't done 强调还没有做这个概念， 而 am doing 是说马上要做，口语中常说的（这时现在进行时表将来的概念，例如I'm coming. I'm going to school），所以选A项。

考点：考查动词时态。