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--- ______ Betty this morning?

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--- ______ Betty this morning?
 --- Not yet, but she is sure to be here before noon.
A.Have you seen B.Will you see
C.Do you see D.Did you see?
--- ______ Betty this morning?
A

由答语中的“Not yet”可断定此题应选A。现在完成时态的用法之一是“表示过去某一时间发生的动作对现在造成的影响或结果”。