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
—Look！Somebody ________ the sofa.—Well，it wasn't me.I didn't do it.(2012·江西)
#63772
A
is cleaning
B
was cleaning
C
has cleaned
D
had cleaned
He complained that this was the third time he of the changes of the meeting date.
#63781
A
would be informed
B
was informed
C
has been informed
D
has been informed
Because of the bad weather, my mother ____ and lay in bed. She ______ for a week.
#63793
A
has been ill; was ill
B
fell ill; has fallen ill
C
fell ill; has been ill
D
fell ill; is ill
It’s reported that in the past 50 years around 80 percent of Beijing’s courtyard houses ______.
#63767
A
had wiped out
B
have wiped out
C
have been wiped out
D
had been wiped out
I wonder why Jenny ____ us recently. We should have heard from her by now.
#63792
A
hasn’t written
B
doesn’t write
C
won’t write
D
hadn’t written