They were worried about ______they could come back.A,if B,wether if 和whether 不都表示“是否”的意思么?

分类: 作业答案 • 2021-12-20 03:27:53

问题描述：

They were worried about ______they could come back.
A,if B,wether if 和whether 不都表示“是否”的意思么?

答

选b 虽然都是是否得意思但是about是介词介词后面用whether