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
-- I have got a headache. -- No wonder. You_________ on the math exercises too long.
#63776
A
work
B
are working
C
have been working
D
worked
—Look! Someone ________ the floor.—Well, it wasn't me. I went shopping just now.
#63763
A
had swept
B
has swept
C
was sweeping
D
is sweeping
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
The final examination is coming up soon. It’s time for us to ________ our studies.
#63788
A
get down to
B
get out
C
get back for
D
get over
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