----- Why is Mr . Yang still in the teachers’office ?
---- Maybe he _______ his work yet .

A．doesn’t finish B．hasn’t finished
C．haven’t finished D．won’t finish

B

解析試題分析：句意：為什么楊先生還在辦公室？也許他還沒有完成他的工作呢。由yet可知該用現(xiàn)在完成時，所以選B。
考點：考查動詞時態(tài)。

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