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[单选题]下列运算正确的是( )。
A. -3(x-1)=-3x-1
B. -3(x-1)=-3x+1
C. -3(x-1)=-3x-3
D. -3(x-1)=-3x+3
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[单选题]48.
A. which
B. how
C. where
D. when
[单选题]_______________
A. trouble
B. fun
C. lessons
D. sports
[单选题]6.—Where _______the chairs?—Sorry,l don-t know.
A. are
B. am
C. is
D. be
[单选题]4. They are_________ food to the homeless.
A. give off
B. give out
C. giving off
D. giving out
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