--Why does the lake smell terrible? ---Because large quantities of water ______.
#85773
A
have polluted
B
is being polluted
C
has been polluted
D
have been polluted
推荐题目
Nobody ___ Tom and John ___ how to run the machine.
#86164
A
except… know
B
but.. know
C
like… knows
D
but..knows
The worker and poet _____ to the party the other day．
#86195
A
is invited
B
was invited
C
had invited
D
invited
E-mail, as well as telephones, ______ an important part in daily communication.
#85713
A
is playing
B
have played
C
are playing
D
play
--There ____ lots of information on sports on ESPN.com．--But most of it is in English．
#43893
A
has
B
have
C
are
D
is
____ there a teacher? ---- No, ____.
#44148
A
Is, there are’t
B
Are, there isn’t.
C
Is, there isn’t
D
Are, there aren’t.