门岗值班员对来访可疑人员可以扣留证件才可准其进入小区。
参考答案:错
—Larry, I will call you at 6 o’clock tomorrow morning.
—Thanks, Mum. But it’s too early. I _____then.
A.am sleeping
B.am to sleep
C.will be sleeping
D.has slept
知识由两要素构成的:()和对()