While the plane is taking of or landing,make sure your seat belt( ) A.fastens B.is fastened

分类: 作业答案 • 2021-12-31 12:12:00

问题描述：

While the plane is taking of or landing,make sure your seat belt( ) A.fastens B.is fastened
句子里make sure是谓语为什么还能选B呢?

答

make sure that 后面接从句
is fastened是从句里的谓语