单项选择题

Scientists generally agree that the Earth’s climate will warm up over the next 50 to 100 years ______it has warmed in the 20,000 years since the Ice Age.

A. as long as
B. as much as
C. as soon as
D. as well as
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单项选择题
A constant supply of nutrients for body requires ______.
A．enough vitamin only
B．a variety of foods
C．a rich breakfast
D．enough food
单项选择题
The speaker implies the workweek in England in early 1800s ______.
A．was from Sunday to Friday
B．was from Monday to Friday
C．was from Monday to Saturday
D．was from Monday to Thursday
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