—Why does the lake smell terrible?—Because large quantities of water .
#103559
A
have polluted
B
is being polluted
C
has been polluted
D
have been polluted
推荐题目
She went to American two years ago .She ____there for half a year and then went to Japan.
#101845
A
would work
B
worked
C
would be working
D
has been working
It is reported that many a new house ____ at present in the disaster area in Gansu Province.
#100529
A
was being built
B
were being built
C
is being built
D
are being built
In the past ten years, the ____mountain climber ____ a lot from his own adventurous _______
#102427
A
experienced; experienced; experience
B
experience; experienced; experiences
C
experienced; has experienced; experiences
D
experience; has experience; experience
He _____ football regularly for many years when he was young.
#101712
A
played
B
was playing
C
has played
D
had played
Unfortunately,when I got there,she ,so we had only time for a few words.
#104545
A
just left
B
had just left
C
has just left
D
was just leaving