We see many special education directors trying to ________ the quality of their programs with much less money and much smaller staff. A、 contain B、 maintain C、 rehearse D、 return

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题目内容（兰州工业学院大学英语3）

We see many special education directors trying to ________ the quality of their programs with much less money and much smaller staff.

A、
contain

B、
maintain

C、
rehearse

D、
return

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