People will have sore eyeballs when crossing snow-covered territory because ______.
A. the eyeballs produce more and more liquid
B. they find nothing to focus on
C. vision becomes unclear
D. tears cover the eyeballs
查看答案
【C15】
A. still less
B. none the less
C. no less
D. any less
The filter will probably best clean water obtained from which of the following？
A. Factories.
B. Inland seas.
C. Mountain streams.
Drug companies.
How long had the man had the car？
A. Six months.
B. Three weeks.
C. Eighteen months.
D. One year.
What does the water purifier remove from the water？
A. Salt.
B. Chemical pollutants.
C. Germs.
D. Minerals.
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