_____several times，but unfortunately，the boy still couldn’t smooth away the problem on his own.
#73673
A
Having been explained
B
The problem having been explained
C
The problem had been explained
D
Although the problem had been explained
推荐题目
-- When can I play computer games, Mum?--______ your homework _______.
#41220
A
Until, finishes
B
Not until, will be finished
C
Until ,is finished
D
Not until, is finished
I don’t know if it _____tomorrow. If it ____, I will stay at home.
#41294
A
will rain, rains
B
rains, will rain
C
will rain, will rain
D
rained, rains
The other day, my brother drove his car down the street at ________ I thought was a dangerous speed.
#74018
A
as
B
which
C
what
D
That
Living things are dying out quickly. Let’s ask ____ destroying them in the past years.
#73211
A
what part people have been playing
B
people have played in
C
what part people have played in
D
people have been playing what part