Mary has __________ herself __________ for the party.
#63748
A
held; up
B
attended; to
C
done; up
D
turned; up
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Kate ________ on her new novel, which is supposed to come out next month.
#63761
A
was working
B
had worked
C
will be working
D
has been working
—Does he know how to work out the problem? —Yes, he has _______ a good idea to solve it.
#63779
A
caught up with
B
kept up with
C
come up with
D
put up with
— Alvin，are you coming with us?—I'd love to，but something unexpected ________.
#63769
A
has come up
B
was coming up
C
had come up
D
would come up
Tom ________ in the library every night over the last three months.(2011·北京)
#63775
A
works
B
worked
C
has been working
D
had been working
Up to now, our society ________ with limited living space and a shortage of natural resources.
#63760
A
has been challenged
B
is being challenged
C
is challenging
D
has challenged