—Heavy smog (雾霾 )in eastern and central China seems to get more and more serious.—I agree. Something          to deal with it.
#38339
A
has done
B
is doing
C
must be done
D
must do
推荐题目
Ssh, please be quiet. The baby _______ .
#40226
A
sleep
B
sleeps
C
is sleepping
D
is sleeping
Mr Li ____ England.  He ____ London for  two weeks.
#37510
A
has been to; has been to
B
has gone to; has been in
C
has been to; has been in
D
has gone to; has been to
His fahter _____in New York last Friday. But he _____here now.
#41583
A
is , was
B
was, is
C
were, is
D
were, was