单项选择题

Where does the man finally decide to spend his vacation

A．Italy.
B．Several European countries.
C．Spain.
D．France.
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单项选择题
Many thousands of hydrocarbon compounds are possible because______.
A．the petroleum products vary greatly in physical appearance
B．complicated refining processes rearrange the chemical structure
C．the two atoms in the molecule assume many positions
D．the pressure needed to force it to the surface causes molecular transformation
单项选择题
Made could hardly recognize the office she went into as__________.
A．she had been there only once
B．Mr. Smith was not in the office
C．nobody was doing any work
D．the office had a new appearance
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