●In C program,all variables must be (70) before use,usually at the beginning of the function before any (71) statements.
(70) A.stated
B.writed
C.illustrated
D.declared
(71) A.operate
B.active
C.executable
D.processing
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3.—__________ 1 go out for a while?
—No,you __________ You must finish your homework first.
A. Must,needn't
B. Can,may
C. May,mustn't
D. May,must
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