---- Why does the river smell terrible? ---- Because large quantities of water______．
#99913
A
have been polluted
B
has polluted
C
has been polluted
D
have polluted
推荐题目
Car rental agencies _______ a boom in business ever since new restrictions made it harder for people to buy an automobile in the capital.
#100686
A
has enjoyed
B
have been enjoying
C
are enjoying
D
enjoyed
The telephone ______ three times in the last hour, and each time it _____ for my father.
#100969
A
had rung; was
B
has been ringing; is
C
rang; has been
D
has rung; was
---- What’s our homework for today, Tom? ---- Oh, sorry. I ______.
#102915
A
hadn’t paid attention
B
was not listening
C
am absent-minded
D
couldn’t hear
By the time she ________ home, her parents will have prepared some delicious food for her.
#101451
A
will get
B
will have got
C
is getting
D
gets
I have to walk to school today because my bike _____now.
#101260
A
is being repaired
B
has been repaired
C
is repaired
D
has repaired