单项选择题

Experts say the space rock is probably （） more than $ 30,000.

A．weighty
B．costly
C．valuable
D．worth

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单项选择题
The architectural differences may （） confusion or discomfort for the foreign travelers.

A．vary
B．describe
C．cause
D．impress
单项选择题
Technology has （） the sharing, storage and delivery of information, thus making more information available to more people.

A．finished
B．furnished
C．functioned
D．facilitated
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