----- Why is Mr . Yang still in the teachers’office ?
---- Maybe he _______ his work yet .
A．doesn’t finishB．hasn’t finished
C．haven’t finishedD．won’t finish
B

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(shí)，所以選B。
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