The articles made of leather cost much more than ______ made of plastic.
A. that
B. those
C. ones
D. it
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在工程项目管理组织结构中，直接调动和安排项目活动，组织落实项目计划的是( )。
A. 协调层
B. 操作层
C. 执行层
D. 决策层
In resent years, computers are being made （）
A. larger and more expensive
B. smaller and cheaper
C. more hard to use
D. to work more slowly
It's hot here, Would you mind ______ the windows.
A. to open
B. open
C. opening
D. opened
Sunlight seems to （） than the light of the moon.
A. have to travel a greater distance
B. move less quickly
C. travel much quickly
D. be less powerfull
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