The scientists ________ on the new medicine for two years. They will succeed in no time.
#38384
A
work
B
are working
C
have worked
D
will work
推荐题目
––There will be a football match tomorrow. Would you like to go with me? ––If I have time, I _______ with you.
#42157
A
went
B
will go
C
have gone
D
go
The books______ into many other languages last year.
#38279
A
translate
B
translated
C
are translated
D
were translated
---- What was wrong with you yesterday evening?---- I ____ my homework when the light went off suddenly.
#42201
A
doing
B
was doing
C
did
D
have done
Sam ______ coins since he was eleven years old, and now he has hundreds of them.
#42209
A
collected
B
had collected
C
has been collecting
D
had been collecting
—____ your sister know Lucy?—No, she ____.
#37709
A
Do; don’t
B
Does; doesn’t
C
Does; don’t
D
Do; doesn’t