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
— What do you think of the Voice of China?— I have no idea, because I it yet.
#36230
A
didn’t see
B
don’t see
C
won’t see
D
haven’t seen
It is reported that more new teaching buildings ___ in our school next term.
#41558
A
will be built
B
was built
C
has built
D
will build
- Look! Somebody_______ the sofa.-Well, it wasn't me. I didn't do it.
#39565
A
is cleaning
B
was cleaning
C
has cleaned
D
cleans