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
推荐题目
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
---I’m very sorry to have ___ you with so many questions. ---It doesn’t matter.
#63778
A
forbidden
B
excused
C
impressed
D
bothered
The world's first flying car has been ________ for sale at ￡800,000 by Courtesy Aircraft of the US.
#63765
A
taken up
B
put up
C
pulled up
D
made up
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
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