It can be inferred from the passage that ______.
A. it is estimated that there will be no food produced by conventional agriculture
B. people haven't been aware of the health benefits of reduced pesticide use
C. a genetic revolution will be one of methods to increase food supplies
D. GM food will be too expensive for people to accept
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已知船在静水中的速度为28km/h，水流的速度为2km/h，则此船在相距78km的两地间往返一次所需时间是（）
A. 5.9h
B. 5.6h
C. 5.4h
D. 4.4h
E. 4h
在年底的献爱心活动中，某单位共有100人参加捐款．经统计，捐款总额是19000元，个人捐款数额有100元、500元和2000元三种，则该单位捐款500元的人数为（）
A. 13
B. 18
C. 25
D. 30
E. 38
The word "amygdala" ( Line 2, Para. 4) probably refers to the area in the brain that ______.
A. memorizes fearful situations
B. reacts to fearful situations
C. control negative emotions
D. reflects unforgettable images
Only ______ with a valid parking perm t are permitted to park in the Corban Building lot.
A. them
B. those
C. which
D. whose
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