--Why does the lake smell terrible? ---Because large quantities of water ______.
#85773
A
have polluted
B
is being polluted
C
has been polluted
D
have been polluted
推荐题目
While the book on the top shelf , you need to be very careful .
#85820
A
to reach
B
reaching
C
reach
D
are reaching
More than one student _____been sent to Japan since 1990. More than one hundred students ______been sent to Japan since 1990.
#86283
A
have; have
B
has; has
C
have; has
D
has; have
24．The teacher together with the students ________ discussing Reading Skills that _______ newly published in America.
#86082
A
are; were
B
is; were
C
are; was
D
is; was
The teacher, along with 5 of her students, ________talking with a foreign teacher in the English Corner at that time.
#85678
A
was
B
were
C
had been
D
would be