Mr Smith _________ a book about China last year but I don’t know whether he has finished it.
A．has writtenB．wroteC．had writtenD．was writing
D
這是由 but I don’t know whether he has finished it 這一句話的語境決定的，全句意為“史密斯先生去年在寫一本書，但我不知道他現(xiàn)在是否寫完了”。有的同學可能由于受 last year的影響而誤選B。但若選B，則句子前半部分的意思則變?yōu)椤笆访芩瓜壬ツ陮懥艘槐緯保热皇恰皩懥恕�，那么這與下文的“但我不知道他現(xiàn)在是否寫完了”相矛盾。
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