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--- We don’t allow _________ in the library .

--- So we had better _________ outside .

A．smoking , smoking                       B．to smoke , smoking

C．to smoke , to smoke                     D．smoking , smoke

We don’t allow ______in the cinema. But you are allowed ______in the rest room.　

A. smoking, smoking           B. smoke, smoking 

C. smoking, to smoke          D. to smoke, to smoke

--- We don’t allow _________ in the library .
--- So we had better _________ outside .

Sorry，we don’t allow ________ in the lecture room.

A. to smoke                B. smoke                               C. smoking                            D. to smoking

Sorry，we don’t allow ________ in the lecture room.

A. to smoke????????????? ????????????? B. smoke????????????? ????????????? ????????????? ????????????? C. smoking????????????? ????????????? ????????????? D. to smoking