The story sounds very interesting, but it is not true.
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The policeman cautioned the prisoners _____ any tricks.
A: not playing
B: not to play
C: not to playing
D: not play
Many small businesses _____ due to the financial crisis.
A: fell
B: dropped
C: collapsed
D: slipped
Please remind me _____ the director at 10.
A: to seeing
B: seeing
C: to see
D: by seeing