--_______was your last summer vacation?--It was great.
#56173
A
How
B
When
C
What
D
Where
推荐题目
David didn’t give up ______ he had failed in the experiment four times．
#57729
A
if
B
while
C
though
D
since
---May I surf the Internet now? ---No,______ you have finished doing the dishes.
#57488
A
unless.
B
if.
C
because.
D
when
grandfather worked very hard, he couldn’t support the big family.
#58131
A
Though, but
B
/, and
C
Though, and
D
Though, /