单项选择题

We've worked out the plan and now we must put it into ______ .

A．fact
B．reality
C．practice
D．deed
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单项选择题
Many countries are increasing their use of natural gas, wind and other forms of ______ .
A．energy
B．source
C．power
D．material
单项选择题
The child was sorry ______ his mother when he arrived at the station.
A．to miss
B．having missed
C．missing
D．to have missed
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