I don’t know _____ he will be back home.
#33403
A
who
B
what
C
when
D
where
推荐题目
It is important to introduce children to healthy nutritious foods from ________ they begin to eat solids.
#30071
A
what
B
when
C
that
D
which
The buses, most of _______ were already full, were surrounded by an angry crowd.
#34636
A
that
B
it
C
them
D
which
Future agriculture should depend on high technology __________ traditional methods.
#32826
A
as good as
B
as far as
C
as well as
D
as long as
Scientists are warning that ________ emissions of carbon (碳排放) are cut, we could be heading for an environmental disaster.
#30282
A
before
B
as
C
unless
D
in case
-What do you think of the music teacher?- she is an elegant lady, she can be extremely difficult to work with.
#30860
A
While
B
When
C
Even if
D
As