吴三桂真的是坏人吗:这道英语题如何选?为什么?

来源:百度文库 编辑:神马品牌网 时间:2024/04/27 22:14:06
79、Before___the office she always makes sure___the lights.( )
A.left, turn off
B.leaving, to turn off
C.leave, turning off
D.to leave, in turning off

B
before是介词 后面加动名词。
make sure to do 确信/确保做某事

B

B before是介词leave作介词的宾语用ing形式
你记住介词后用doing 就可以了,但具体情况具体分析。
make sure to do sth 是固定搭配

B

B

B.leaving, to turn off