---- Why does the river smell terrible? ---- Because large quantities of water______．
#99913
A
have been polluted
B
has polluted
C
has been polluted
D
have polluted
推荐题目
--You speak very good French! ---Thanks. I _________ French in Sichuan University for four years.
#102828
A
studied
B
study
C
was studying
D
had studied
Your desk is covered with too many unnecessary things, including used papers and books. You’d better ________ some of them.
#101200
A
remain
B
replace
C
remove
D
renew
Many students_______ from the new library since it was open to all.
#100445
A
benefited
B
were benefited
C
have been benefited
D
have benefited
—Time . It’s likely that we’ll miss the deadline. —Don’t worry. We have already got through 80% of the job.
#103219
A
is running out
B
has run out
C
is being running out
D
has been run out
John talked with me for about an hour yesterday．Never ________ him talk so much．
#99991
A
did I hear
B
had I heard
C
I had heard
D
I heard