—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, trying to improve the situation .
#101218
A
worked
B
had worked
C
are working
D
had been working
推荐题目
．The highest award was given to Anna, who _____ so hard on the project for years, and at last her efforts paid off.
#103794
A
has worked
B
worked
C
was working
D
had been working
--- I ____ so busily recently that I ____ no time to help you with your maths.---That’s OK. I can manage it by myself.
#100194
A
had been working; had had
B
have been working; had
C
have been working; have
D
am working; will have
— Hello, I _______ to ask if I can book two tickets for tonight’s film.— Sorry, we’ve already sold out.
#100401
A
phone
B
will phone
C
am phoning
D
have phoned
We _____to Sydney next Monday. What about having a party this weekend?
#101670
A
have flown
B
flew
C
are flying
D
had flown
-You were not in when I came over to your house. -Oh, I ____________ for a friend from England at the airport.
#99389
A
was waiting
B
had waited
C
am waiting
D
have waited