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
推荐题目
In order to reduce the increasing prices of vegetables, the toll____ if a truck carrying them passes through a toll station．
#102998
A
has cancelled
B
is cancelled
C
was cancelled
D
had been cancelled
—I will pick you up at 6 tomorrow morning. —So early! I _______ then.
#99528
A
will sleep
B
will have slept
C
will have been sleeping
D
will be sleeping
It has been announced that the 2014 World Cup＿＿＿＿＿in Brazil from June 12一July 13，2014，in 12 hosting cities．
#99773
A
will stage
B
has staged
C
will be staged
D
is staged
The silence in the dark building was scaring. No sound and voice____ heard at that moment.
#101923
A
were
B
was
C
is
D
are
— Tom, did Mr. Li join you in your discussion? — No, he＿＿, but he happened to have fallen ill.
#104414
A
would like to
B
will
C
was to have
D
was going to join