They _________ on the program for almost one week before I joined them, and now we are still working on it as no good results have come out so far.
#103812
A
have worked
B
had worked
C
have been working
D
had been working
推荐题目
----You look pale and upset. ----Yes, my girl friend _____ an online chat with me non-stop until six o’clock this morning.
#104830
A
have been having
B
had had
C
was having
D
am having
The Chinese ___ less sugar and fat than many other countries in the world.
#104033
A
eats
B
eat
C
ate
D
have eaten
A computer cannot remember who_____; it simply does what _________.
#103663
A
will use it; it is told
B
uses it; it has told
C
used it; it is told
D
has used it; it told
—I don’t believe we _______ before. —Well, I saw you once at a party, but we ______ introduced.
#102406
A
have met; weren’t
B
met; weren’t
C
have met; haven’t been
D
met; haven’t been
—Look, where are you going!—Sorry, I _______.
#100564
A
wasn’t noticing
B
didn’t notice
C
haven’t noticed
D
am not noticing