单项选择题

-- Are we supposed to take off our shoes before we enter
-- No, you ().

A.shouldn't
B.needn't
C.mustn't
D.can't

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单项选择题
Today is May Day. There are ()students dancing and singing in the park.

A.a good many
B.a good many of
C.the large number of
D.a great deal of
单项选择题
-- Which will you have then, the white one or the blue one -- I'll take () to give myself a change sometimes.

A.one
B.two
C.both
D.either
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