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
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When to go for the on-salary holiday yet?
#63766
A
are not decided
B
have not been decided
C
is not being decided
D
has not been decided
—I remember you were a talented pianist at college.Can you play the piano for me?—Sorry，I ________ the piano for years.(2012·湖南)
#63770
A
don't play
B
wasn't playing
C
haven't played
D
hadn't played
It's said that they ________ a better life ever since they moved to the US.
#63764
A
had enjoyed
B
have been enjoying
C
were enjoying
D
would enjoy
Minister Bill De Blasio in office fewer than 48 hours when he came face to face with his biggest challenge in his life．
#63755
A
has been
B
had been
C
would be
D
is
—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