---Has Tom finished his composition yet?
　 ---I have no idea, he _____ it this morning.
A．would write 　　B．has written 　　C．wroteD．was writing
D
考查時(shí)態(tài)。根據(jù)語(yǔ)境及時(shí)間狀語(yǔ)this morning可知用過去進(jìn)行時(shí)。句意：——湯姆完成他的作文了嗎？——我不知道，今天早上他一直在寫。
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