— 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
One or two days ____quite enough to complete the work. ___ you or he going to work with me?
#86049
A
is; Is
B
is; Are
C
are; Is
D
are; Are
-------Each of the students，working hard at his other lessons，______to go to university.---So do I.
#85776
A
hope
B
hopes
C
hoping
D
hoped
--Why are your group so happy? --Our group _______ theirs in the oral English competition.
#86255
A
has won
B
have gained
C
has beaten
D
have defeated
He is the only one of the students who a winner of scholarship for three years.
#85889
A
is
B
are
C
have been
D
has been
It is reported that large amounts of locusts(蝗虫) _____ in their activity in the north now.
#85965
A
is
B
are
C
was
D
were