摘要： -- 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
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-- ________? 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
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-- ________ 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
查看习题详情和答案>>
-- ________ 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 |