The number of the workers here ___ 200. Half of them ____under 30 years old.
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A
are, are
B
is, are
C
are, is
D
is, is
推荐题目
 It is time for class. Let’s  stop _______.
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A
playing football
B
play football
C
from playing football
D
to play football
 Your sister is studying in the room. Let’s _________.
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A
quiet
B
be quiet
C
to be quiet
D
to keep quiet