^_Don't   ___too late, or you will feel tired in class tomorrow.

^_I won't, Mom.[ ]

A. give up

B. stay up

C. look up

D. turn up

临边作业的防护主要是()，并有其他防护措施。

A．搭设操作平台

B．搭设脚手架

C．搭设吊篮

D．设置防护栏杆