以下哪几种属于RNC设备的检测周期()
A.半年
B.周
C.天
D.月
参考答案:A, B, C, D
They are making too much noise here. Let's go __________.[ ]
A. somewhere quiet
B. nowhere quiet
C. everywhere noisy
D. anywhere noisy
In fact, a small car is big enough for a family of three, ______ you need more space for luggage.
A.once
B.because
C.as if
D.unless