2、The river smells terrible. We must ______ people from ______ dirty things into it.

A．stop, throw     B．stop ,throwing     C．to stop, to throw      D．stopping ,throwing

2、B

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The river smells terrible. We must ______ people from ______ dirty things into it.

A．stop, throw     B．stop ,throwing     C．to stop, to throw      D．stopping ,throwing

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