— Why does the lake smell terrible?— Because large quantities of water ____.
#85686
A
have polluted
B
is being polluted
C
has been polluted
D
have been polluted
推荐题目
He said that what Mary had bought from the supermarket that morning ________ only a few potatoes, eggs and salt, but I don’t think what he said ________ true.
#85761
A
are;are
B
were;is
C
is;is
D
were;are
The boy’s parents, who let him play football indoors, rather than the boy ________ to blame for the broken window.
#86257
A
was
B
be
C
to be
D
were
The number of smokers in China ________increased in recent years, and a number of them _________ the youth.
#85595
A
has; are
B
have; are
C
is; is
D
are; are