---Alice, you look puzzled, Have you understood it?---No．I _____another problem just now．
#101781
A
l have thought of
B
am thinking of
C
had thought of
D
was thinking of
推荐题目
The political situation in Libya will become even worse unless some measures ______.
#101668
A
will be taken
B
are taken
C
have taken
D
are to take
If you __________ me, I will give you some advice.
#104458
A
listen to
B
will listen to
C
listen
D
are listening
This is the best chance for you to go abroad. Don't ________.
#99665
A
throw it away
B
put it away
C
take it away
D
hide it away
When I was in the countryside, I ____ by the riverside every day.
#101180
A
walked
B
was walking
C
walk
D
have walked
—Have you known Dr. Jackson for a long time?—Yes，since she ________ the Chinese Society.
#99164
A
has joined
B
joins
C
had joined
D
joined