题目内容
To make our city more beautiful, rubbish ________ into the river.
[ ]
A.
must throw
B.
can't throw
C.
needn't be thrown
D.
mustn't be thrown
答案:D
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题目内容
To make our city more beautiful, rubbish ________ into the river.
must throw
can't throw
needn't be thrown
mustn't be thrown