Mr. Wu___this math problem____him many times, but he still doesn’t understand it.
#38768
A
explains ; to
B
has explained ; for
C
has explained ; to
D
explained ; with
推荐题目
—Will you come to the dinner party?---I won’t come unless Jenny ___________。
#39776
A
will be invited
B
can be invited
C
invited
D
is invited
- Where is my raincoat? -I don't have the slightest idea.______ the room?
#36881
A
Did you check
B
Do you check
C
Have you checked
D
Are you checking
Be quiet! The students ______ a physics test in the next room.
#36443
A
had
B
have had
C
were having
D
are having
The meeting _________ by the time I got there yesterday.
#40511
A
was on
B
has been on
C
had begun
D
has begun
—Are you going anywhere?—I ______about visiting my sister, but I have changed my mind.
#36299
A
think
B
have thought
C
will think
D
thought