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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My study of biology has ______ much of my spare time, but it has given me a great deal of enjoyment.
#63787
A
taken off
B
taken down
C
taken up
D
taken away
In the last few years thousands of films ____ all over the world.
#63784
A
have produced
B
have been produced
C
are producing
D
are being produced
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
The wide popularity of the Korean music Gangnam Style has _________ heated discussions about people’s tastes nowadays.
#63749
A
set about
B
set aside
C
set off
D
set down
Mary has __________ herself __________ for the party.
#63748
A
held; up
B
attended; to
C
done; up
D
turned; up