单项选择题

The best title for this passage may be （）

A．The Importance of Electricity
B．The Pollution of Making Electricity from Fossil Fuels
C．The Advantage of Using Nuclear Energy
D．Means of Making Electrical Power

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单项选择题

The young man ______ in this company since he graduated from Madison College five years ago.

A．was working
B．has been working
C．works
D．worked

单项选择题

He said he’d phone you ______ he got home.

A．for a while
B．after a while
C．at moment
D．the moment