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 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

About 90 percent of the equipment presented by the administration， as well as the facilities of our own， 　　　　 made good use of in the teaching.

A. have   B. has   C. have been   D. has been

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．

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

 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

About 90 percent of the equipment presented by the administration，as well as the facilities of our own，_____made good use of in the teaching．

A．have    B．has    C．have been D．has been

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．

(  )30. About 90 percent of the equipment presented by the administration， as well as the facilities of our own， 　　　　 made good use of in the teaching.

A. have   B. has   C. have been   D. has been