SometimesJim _____________ onSunday.[ ]

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问题选择题

Sometimes Jim _____________ on Sunday. [ ]

A. plays basketball

B. plays the volleyball

C. playing basketball

D. play volleyball

答案

答案：A

选择题

It is generally believed that ______a piece of field is, ______ it produces. [ ]

A. the more fertile; the higher output of grain

B. more fertile; more output of grain

C. the fertile; the higher output of grain

D. the fertile; the more grain output

单项选择题

离心式通风机风压不足是由于（）造成的。

A.管道系统阻力估计过低

B.介质密度大于额定数据

C.介质密度小于额定数据

D.介质比重大于额定数据