—Why does the lake smell terrible?—Because large quantities of water______.          
#101560
A
have polluted
B
is being polluted
C
has been polluted
D
have been polluted
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—What’s that noise, John?—Sorry, Linda.I forgot to tell you.The school library ______.
#102394
A
is rebuilt
B
is being rebuilt
C
was rebuilt
D
has been rebuilt
Don’t look down upon the ugly little worm. In a few weeks , it ________into a beautiful big butterfly.
#100645
A
transforms
B
would transform
C
have transformed
D
will transform.
They_____trouble lifting the heavy box.
#103891
A
didn’t have many
B
hadn’t a lot of
C
didn’t have much
D
haven’t a great deal of