--Haven't you seen Mr. Wilson at the lecture? --Yes, but he had left _________ I could ask him any questions.
#31720
A
when
B
before
C
after
D
as
推荐题目
They were surprised that a child should work out the problem____ they themselves could not.
#31497
A
once
B
unless
C
while
D
if
I had walked a few steps _______ I realized that I was lost in the thick fog.
#80162
A
unless
B
Before
C
When
D
since
Most of the developing countries are faced with lots of troubles , _____the financial problem is not the worst .
#34828
A
which
B
with which
C
that
D
of which
(2013·天津12区二模)He never thought that his success came ________ he least wanted it.
#30551
A
until
B
since
C
when
D
while
The wise parents can tell whether their children are telling the truth____ they listen to their excuses to wrong deeds.
#30945
A
the first time
B
for the first time
C
every time
D
for every time