Nobody can explain the mystery ____ he suddenly disappeared.
#70049
A
why
B
what
C
whether
D
which
推荐题目
.Who is the person ____is talking about the accident ___happened on Highway 104?
#71009
A
which, which
B
who, what
C
that, that
D
what, what
---Where did you get to know her? ---It was on the farm we both once worked in the 1970s.
#69979
A
that
B
which
C
when
D
where
The result of the experiment was very good, _____ we hadn’t expected
#71920
A
when
B
that
C
which
D
what