-Why does the Lake smell terrible? -Because large quantities of water .
#104968
A
have polluted
B
is being polluted
C
has been polluted
D
have been polluted
推荐题目
Would you please keep silent? The weather report ____ and I want to listen.
#100721
A
is broadcast
B
is being broadcast
C
has been broadcast
D
had been broadcast
Chinese Premier Wen Jiabao _______an important speech on April 30,2011 in Indonesia, __________he is currently on an official visit .
#101710
A
is delivering ; that
B
was delivered ; in which
C
delivered ; where
D
had delivered ; when
My documents are always ______ out according to the contents(内容) and dates so that I have no trouble in finding them when they _______.
#103151
A
set; are needed
B
put; need
C
sorted; are needed
D
written; need
Years ago we didn't know this, but recent science study ________that people who don't sleep well soon get ill.
#100471
A
showed
B
will show
C
has shown
D
is showing
Though Jack _______ many times, he still plays computer games after school.
#102234
A
was warned
B
has been warned
C
has been warning
D
had warned