单项选择题

Children nowadays are over-protected by their parents, therefore become (spoil) ______.
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单项选择题
Never before that night ______ the extent of his own power.
A．had he felt
B．he felt
C．did he felt
D．he had felt
单项选择题
I have some difficulty ______ some of the words in English.
A．pronounce
B．to pronounce
C．pronouncing
D．of pronouncing
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