--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
John was cleaning the window and Mary was watching TV.
#33577
A
at the meantime
B
when
C
meanwhile
D
while
Mother made a promise ____ I passed the college entrance examination she would buy me a mobile phone.
#80153
A
that
B
if that
C
that if
D
that whether
Students are required to go out in couples, especially in the evenings, with friends ______ they get into trouble.
#30775
A
even if
B
if only
C
in case
D
when
______all of them are strong candidates, only one will be chosen for the post.
#30864
A
Since
B
As
C
If
D
While
children believe they can succeed, they will never become totally independent．
#32545
A
If
B
Though
C
Unless
D
When