The scientist __________ the experiment for half a year, but he _______ yet.
#102041
A
made; didn’t succeed
B
made; hasn’t succeeded
C
was making; didn’t succeed
D
has been making; hasn’t succeeded
推荐题目
When I called you this morning,nobody answered the phone.Where______?
#104069
A
did you go
B
have you gone
C
were you
D
had you been
It is the third time that he ____ the first prize in the competition.
#101804
A
wins
B
won
C
has won
D
had won
--- What’s that unpleasant noise? --- Oh, the road before the main gate _____.
#102977
A
is repairing
B
is being repaired
C
is repaired
D
has been repaired
Naturally, after I told her what to do, my daughter _____ go and do the opposite !
#104883
A
may
B
can
C
must
D
should
---_____ you ______ the Beatles’ story?.---Yes. And their songs are popular.
#99030
A
Did; hear
B
Do; listen to
C
Have; heard of
D
Have; listened to