—Why does the lake smell terrible?—Because large quantities of water ________.
#99571
A
have polluted
B
is being polluted
C
has been polluted
D
have been polluted
推荐题目
—Mary, are you sure your aunt ___ back from America?—Yes. My mother ___ me. I am going to see her now.
#100474
A
has come; told
B
came; had told
C
had come; tells
D
is coming; has told
The school board listened quietly as Jack read the demands that his classmates ______ forward.
#101151
A
be putting
B
had put
C
were put
D
have put
Those postcards were so lovely that they_________ in no time.
#99830
A
sold
B
had been sold
C
were sold
D
have been sold
He will stop showing off, if no notice ＿＿ of him.
#104433
A
is taken
B
will be taken
C
takes
D
has taken
Months ago we sailed ten thousand miles across this open sea，which the Pacific，and we met no storm．
#102005
A
was called
B
is called
C
had been called
D
has been called