Because of the heavy traffic, it was alr

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问题选择题

Because of the heavy traffic, it was already time for lunch break she got to her office.

A．since

B．that

C．when

D．until

答案

答案：C

根据题意可以判断是，因为交通很拥挤，等她到达办公室时已经是午饭空了。

选择题

It is nice to do something for someone else out of the blue and not to expect anything ______.

A．in relief

B．in return

C．in turn

D．in need

多项选择题

活塞式压缩机排气阀发生泄漏的判断方法为（）。

A、吸气压力升高；

B、排气压力下降；

C、吸气温度不变；

D、排气温度升高。