单项选择题

That sound doesn't______in his language, so it's difficult for him to pronounce it.

A．happen
B．occur
C．have
D．take place
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单项选择题
In a sudden______of anger, the man tore up everything within reach.
A．attack
B．burst
C．split
D．blast
单项选择题
He is______about his chances of winning a gold medal in the Olympics next year.
A．optimistic
B．optional
C．outstanding
D．obvious
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