A lot of farmers refused _____ the new machine, but the engineer persuaded them

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A lot of farmers refused _____ the new machine, but the engineer persuaded them _____ his invention.[ ]
A. to use, try
B. to use, to try
C. use, trying

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举一反三

—Does his mother encourage him _____the piano?
—Of course she does.[     ]
A. to play
B. playing
C. play
C. plays

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We should encourage the children affected by the earthquake _____ happy to face the life in future. [     ]
A. being
B. are
C. to be
D. were

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We didn’t expect ____________ you here. [ ]
A. see
B. to see
C. seeing

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They expect ______the work next Tuesday.  [     ]
A. finish
B. finishing
C. will finish
D. to finish

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It’s our duty ______the environment.[      ]
A. protect
B. to protect
C. protecting
D. of protecting

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