----- I’m going to the States. ----- How long ______ you ______ in the States?
#104148
A
are; stayed
B
are; staying
C
have; stayed
D
did; stay
推荐题目
—Have you thought of the topic for the composition? — Not yet．I _____ it very carefully, but I haven’t decided.
#104122
A
will consider
B
have been considering
C
had considered
D
was considering
Tom killed the cat. I’ll ask him why _______.
#101009
A
he did that
B
did he do that
C
he does that
D
he had done so
Ladies and gentlemen, please fasten your seat belts. The plane ______..
#99022
A
take off
B
is taking off
C
has taken off
D
took off
With the help of high technology, more and more substances _________ in the past years.
#101033
A
discovered
B
have discovered
C
had been discovered
D
have been discovered