问题
选择题
Nowadays, good babysitters are in great _____, so many companies have been set up to train good babysitters.[ ]
A. request
B. need
C. demand
D. requirement
答案
答案：C
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Nowadays, good babysitters are in great _____, so many companies have been set up to train good babysitters.[ ]
A. request
B. need
C. demand
D. requirement
答案：C