【題目】 --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

【答案】B

【解析】

試題分析∶考查過去進(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；C完成時(shí)；D過去完成時(shí)。結(jié)合情境知，回答者不知道做完沒，只記得今早那會(huì)Billy在做。過去進(jìn)行時(shí)。

考點(diǎn)∶考查過去進(jìn)行時(shí)

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