-Why does the river smell terrible? -Because the water_______.
#42170
A
was polluted
B
has been polluted
C
will be polluted
D
has polluted
推荐题目
— How long ________ they ________ the English Club?  — For almost one year.
#40116
A
have; been
B
have; been in
C
did; join
D
did; join in
Listen, a small number of students ______ in the classroom. 
#40135
A
talk
B
talks
C
is talking
D
are talking