--Has Billy finished his homework today?

--I have no idea. He ______ it this morning.

A. would do B. was doing

C. has done D. had done

B

【解析】

試題分析：考查過(guò)去進(jìn)行時(shí)。句意∶貝蕾完成他的作業(yè)了嗎？我不知道他早上在做。A將來(lái)；C完成時(shí)；D過(guò)去完成時(shí)。結(jié)合情境知，回答者不知道做完沒(méi)，只記得今早那會(huì)Billy在做。過(guò)去進(jìn)行時(shí)。

考點(diǎn)：考查過(guò)去進(jìn)行時(shí)

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