——Is there any possible way to help them get rid of such a bad habit? ——To tell the truth, it’s very hard. But we_______ on this problem.
#103283
A
worked
B
had worked
C
are working
D
had been working
推荐题目
The person we talked about ____ our school last week．
#104467
A
visiting
B
will visit
C
visited
D
has visited
I wasn’t aware of this before, but recent research _____ that eating too much fat can contribute to heart disease.
#102842
A
has shown
B
will show
C
was showing
D
showed
He would have been a doctor 20 years ago, but he _____ to be a teacher.
#101819
A
chooses
B
chose
C
had chosen
D
has chosen
—You’ve made great progress in your English study, haven’t you?—Yes, but much .
#102651
A
remains to do
B
is remained to do
C
remains to be done
D
is remained to be done
Because the shop ________ , all the T-shirts are sold at half price.
#104747
A
has closed down
B
closed down
C
is closing down
D
had closed down