While the plane is taking of or landing,make sure your seat belt(_英语解答

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?

人气：205 ℃　时间：2020-04-25 14:42:42

解答

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