His father will be back from Beijing ________a month.

问题描述:

His father will be back from Beijing ________a month.
C.in D.for
D 为什么错了?

for接的是完成时语态
in接的是将来时语态
句意:我的爸爸将在一个月后从北京回来.
望采纳,多谢了!