On the international market, the price of petroleum has been falling down, which is now _____ it used to be.
#14056
A
as one third as
B
one third as much as
C
one third more than
D
as one third much as
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I haven’t been home to see my parents for two weeks; I _______ them.
#14228
A
can’t wait see
B
can’t wait to see
C
can wait for
D
couldn’t wait for
—How did the fire_____?--By a car accident.
#13318
A
come about
B
come on
C
come to
D
come over
   the buildings were knocked down in the earthquake in the city of  Tangshan..
#11833
A
A great deal of
B
A great many
C
The number of
D
A great many of