I think it must have been in 1967 ______ I visited the Great Lake the first time.A:when B:which C:where D:that

问题描述:

I think it must have been in 1967 ______ I visited the Great Lake the first time.
A:when
B:which
C:where
D:that

D

D. 要注意是in 1967,这个in是很关键的。有了in,就是强调句式,强调了是在1967年这个时间。

D
是强调句
It must have been.that.
是 It is.that.变化而来(表示肯定的猜测)

A.
应为后面形容的是个时间
=枫's guarantee tag=