The worker warned us the machines. They are dangerous. [ ]A. touc

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The worker warned us           the machines.  They are dangerous. [     ]
A. touch
B. not touch
C. not to touch
D. touching

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举一反三

Sean"s health is worse than before. Mr Smith has  warned him ______.[     ]
A. to smoke
B. not smoke
C. not to smoke
D. smoking

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The man jumped into the river _____  the baby.[     ]
A. to save
B. saving
C. and save
D. saved

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I"ll try _____ the same mistake again.  [     ]
A. to not make
B. not to make
C. not making
D. not make

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Would you like _______with me this weekend? [ ]

A. to go fish
B. going to fish
C. to go fishing
D. going to fishing

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I try __ work nine hours every day. [ ]
A. in
B. at
C. to
D. for

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