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单项选择题

Walt was ______ when be heard the strange sound.

A．reading
B．singing
C．drawing
D．playing

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热门试题

单项选择题The native language is a person's ______ language.

A．first
B．only
C．one
D．foreign

单项选择题People in China use English as a ______ language.

A．first
B．second
C．foreign
D．native