—Why does the lake smell terrible?—Because large quantities of water______.
#101560
A
have polluted
B
is being polluted
C
has been polluted
D
have been polluted
推荐题目
--I left my handbag on the train, but luckily someone gave it to a railway official.--How unbelievable to get it back! I mean, someone it.
#99661
A
will have stolen
B
might have stolen
C
should have stolen
D
must have stolen
Many students apply for a position at that company, but only a few _____.
#100909
A
are being accepted
B
are accepted
C
have accepted
D
accept
— The room is dirty. — I know. It ______ for several weeks.
#101322
A
hasn’t cleaned
B
didn’t clean
C
wasn’t cleaned
D
hasn’t been cleaned
This is the second time that the top 10 list of popular novels _____ published by this magazine.
#102447
A
has been
B
are
C
is
D
have been