Students are usually under pressure of work because ______.
A. their performance will affect their future careers
B. they are heavily involved in student affairs
C. they have to observe university discipline
D. they want to run for positions of authority
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The purpose of the motivation study was to discover why ______.
A. there were deeper reasons
B. instant coffee did not taste good
C. regular coffee was successful
D. people didn't like instant coffee
The usual address for a Web site is the ______ page address， although you can enter the address of any page and have that page sent to you.
A. home
B. main
C. host
D. House
居住在海拔200米～500米这一高度内的人口在总人口中所占的比例是()。
A. 56.2%
B. 27.8%
C. 24%
D. 29.5%
A．rareB．minorC．scarceD．regular
A. rare
B. minor
C. scarce
D. regular
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