Public attention at the moment is ______ on the problem of how to create  opportunities for the laid-off workers.
#103481
A
focused
B
paid
C
attracted
D
concerned
推荐题目
It is well known to us all that a lot of rivers _______by factories.
#102816
A
are polluting
B
have been polluting
C
are being polluting
D
are being polluted
Helen ______ her keys in the office so she had to wait until her husband ______ home. 
#102080
A
has left; comes
B
left; had come
C
had left; came
D
had left; would come