Professor Smith, along with his assistants, _________on the project day and night to meet the deadline.
#102351
A
work
B
working
C
is working
D
are working
推荐题目
—Sorry, sir, your car isn’t ready yet. It _____ in the garage.―That’s all right.
#102997
A
is repaired
B
is being repaired
C
hasn’t repaired
D
has been repaired
 His sister left home in 1998, and _______ever since.
#99521
A
has not heard from
B
had not heard from
C
has not been heard of
D
had not been heard of
Up to now, they _________ a good way to solve that problem.
#102584
A
didn’t find
B
can’t find
C
hadn’t found
D
haven’t found