Since last century, his family （） teachers.

A.are

B.are being

C.have been

D.were being

答案

C、have been

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第1题

The last half of the nineteenth century ______ the steady improvement in the means of trav

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A．have witnessed

B．was witnessed

C．witnessed

D．is witnessed

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第2题

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第3题

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A、revolving

B、investigating

C、restoring