A．inB．offC．backD．up
A. in
B. off
C. back
D. up
What is the study about？
A. Reaction times for drivers drinking alcohol in comparison with those of nondrinkers
B. The effects of drinking beer as compared with those of drinking gin and tonic
C. The time that it takes to stop a car going 35 miles per hour when the brakes are applied
D. The problems of riding bicycles on college campuses that have 35 mile-per-hour speed limits
A．securityB．trafficC．libraryD．dorm
A. security
B. traffic
C. library
D. dorm
A．differedB．confusedC．changedD．mixed
A. differed
B. confused
C. changed
D. mixed
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