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
I have two elder brothers,（）in the army for ten years.

A．the elder of whom served
B．the older having served
C．the older of which served
D．the elder one has served
单项选择题
We didn't know his telephone number; otherwise we（）him.

A．would have called
B．must have called
C．would call
D．had call
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