单项选择题

I’m studying tourism with a（）on environmentally friendly travel.

A.focus
B.distraction
C.state
D.timeline

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A.An increase in demand is likely to cause a rise in prices.
B.Increases in demand usually lead price increases.
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单项选择题What apparently had happened，three years ago，was that Kate（）to a different building.

A.went
B.has gone
C.had gone
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外语考试试题及答案解析

I’m studying tourism with a（）on environmentally friendly travel.