— 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
I wonder whether the teacher is one of those who _______ to the mountain village to help the children there.
#85644
A
have sent
B
has sent
C
has been sent
D
have been sent
________an important decision more on emotion than on reason, you will regret it sooner or later.
#85853
A
Based
B
Basing
C
Base
D
To base
_____number of the students in our class ______ 40. _______ number of them ______ sporty.
#44225
A
The , is; The, are
B
The, are; A, is
C
The, is; A, are
D
A, are; The, is
Mary as well as her elder sister who______ Chinese at university ______ gone to China for holiday.
#86036
A
studies; has
B
study; have
C
studies; have
D
study; has