In fact, I wonder _________ my efforts were all in vain.
#30844
A
that
B
which
C
why
D
where
推荐题目
Scientists say it may be one year or so ________ it is possible to test the new medicine on human patients.
#32551
A
when
B
after
C
before
D
since
To improve the quality of our products, we asked for suggestions _____ had used the products.
#32306
A
whoever
B
who
C
whichever
D
Which
________ I admit that there are problems, I don’t agree that they can’t be solved.
#34729
A
When
B
As
C
While
D
But
Most of us value our time, but some of us treat it ________ it had no value at all.
#30169
A
even if
B
as long as
C
even so
D
as though