Living alone in a house, the writer seems to
A. have totally forgotten her work.
B. be afraid of her neighbors.
C. get some comfort from TV programs.
D. have gone crazy.
查看答案
Which of the following is NOT mentioned as a reason for the disrupted sleep of travelers
A. Crossing different time zones.
B. Changing light and activity levels.
C. Working longer hours.
D. Watching out of the plane for a long time.
Compared with the clear words of her boyfriend on screen, his accent is
A. obscure.
B. distinct.
C. unreal.
D. misleading.
图4-6示意的为（）设计模式，表示一个作用于某对象结构中的各元素的操作。
A. Visitor(访问者)
B. Observer(观察者)
C. Flyweight(享元)
D. Prototype(原型)
The dolphin leapt up into the air because Sagan was too near the water.
A. Right
B. Wrong
C. Not mentioned
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