-- ________  your homework yet?
-- Not yet. I _______ it.

A．Have you done; am doingB．Did you do; am doing
C．Have you done; didD．Did you do; did

A

解析試題分析：句意：你完成作業(yè)了嗎?還沒(méi)有。我正在做。由yet可知該句用現(xiàn)在完成時(shí)態(tài)，結(jié)合情景知后句用現(xiàn)在進(jìn)行時(shí)態(tài)。所以選A。
考點(diǎn)：考查動(dòng)詞時(shí)態(tài)。

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