单项选择题

You are exposed to obtrusive ads that () seemingly from nowhere even when you are disconnected from the Net, and your personal information is gathered and sent off without you being aware of it.

A. size up
B. dwindle away
C. conjure up
D. pop up

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单项选择题
If you work for a major corporation, or are contracted at one, sooner or later, you may be called upon to create or maintain an internal website. Here are the () of intranets.

A. ins and outs
B. in a pinch
C. in a cleft stick
D. in a breeze
单项选择题
The author mentions each of the following as an advantage of Chicago’s location EXCEPT its ().

A. hinterland
B. nearness to a large lake
C. position in regard to transport routes
D. flat terrain
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