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The river smells terrible . People must       dirty things .

A. be stopped from throwing         B. stop from throwing

C. stop to throw                    D. stop from throwing

The river smells terrible. People must ________ dirty things into it.

A. be stopped to throw

B. be stopped from throwing

C. stop to throw

D. stop from throwing

The river smells terrible. People must ________ dirty things into it.

A. be stopped to throw

B. be stopped from throwing

C. stop to throw

D. stop from throwing

The river smells terrible. People must ________ dirty things into it.

[　　]

The river smells terrible. People must ________ dirty things into it.

[　　]

 The river smells terrible. People_______ dirty things into it .

  A. must stop to throw           B. must stop from throwing  

C. must be stopped to throw      D. must be stopped from throwing