13．About 90 percent of the equipment presented by the administration，as well as the facili

发布时间：2020-08-15 02:33:49


13．About 90 percent of the equipment presented by the administration，as well as the facilities of our own，          made good use of in teaching．
A. have
B. has
C. have been
D. has been

网友回答

A. have
B. has
C. have been
(答案→)D. has been
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