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