单项选择题

How do officials know that alcohol is a problem at the school()

A. Students are getting bad grades.
B. There are too many bars on the campus.
C. Only a few students drink.
D. Several students have died and one is in a coma.

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单项选择题

James’ mother ()

A. was educated
B. was conservative
C. was poor
D. A and B

单项选择题

Right now the California Air Resources Board requires that a percentage of new cars sold should be flee of emissions. What is that percentage()

A. 1%.
B. 5%.
C. 10%.
D. 100%.