—Has he finished his essay? —I don’t know. He______it this morning.

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问题 —Has he finished his essay? —I don’t know. He______it this morning.

选项 A、has written
B、was writing
C、wrote
D、had written

答案B

解析 既然答句说不知道是否完成,则应该说看到他正在写,而不是看到他写完 了,故选B。
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