They____on the program for almost one month before l was arranged to help them. Now, we____on it as no result has come out.
#99542
A
had been working: are still working
B
had worked; were still working
C
have been working; have worked
D
have worked; are still working
推荐题目
Since the project has been ___ on well, you must ___ it on until it is completed.
#101519
A
carrying, carry
B
going, carry
C
going, go
D
carrying, go
Mike ______with Janet for over one year before they got married.
#103142
A
had fallen in love
B
had been in love
C
has fallen in love
D
has been in love
I won't buy this iPhone unless the price ________ to under 2,000 yuan. 
#99484
A
reduces
B
will be reduced
C
has reduced
D
is reduced
The library needs ________, but it’ll have to wait until Sunday.
#104295
A
cleaning
B
be cleaned
C
clean
D
being cleaned
—What will you be doing at 4:00 tomorrow afternoon?—I _____ in my office.
#104565
A
will be typing
B
am typing
C
am about to type
D
will type