— Have you finished your composition already?
— Yes. I ______ it in twenty minutes.  
A．have finishedB．finishedC．will finishD．had finished
B
此題考查時(shí)態(tài)的用法。此題易誤選答案C，若選C，則說明作文還未寫完，這與前
面的回答Yes 矛盾；如果選A，則強(qiáng)調(diào)的是動作的影響；而D為過去完成時(shí)態(tài)，必須相對
于過去時(shí)態(tài)而言，但句中并沒有使用過去時(shí)態(tài)。一般來說，用現(xiàn)在完成時(shí)態(tài)提問，而用一般
過去時(shí)態(tài)回答。故只能選答案B。
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