单项选择题

If（）to a high temperature, ice Will change to water.

A. heating
B. being heated
C. to heat
D. heated

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单项选择题

Evidence came up（）special speech sounds are recognized by babies as young as six months old.

A. what
B. that
C. which
D. whose

单项选择题

Don' t be that serious; he is a（）child.

A. fair
B. mere
C. rare
D. slender

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