The author implies what the troubled boys needed most was _________.
A. strict guidance in proper behavior
B. challenging demand in hard work
C. sympathy and tolerance from adults
D. understanding and trust from others
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People who work at night_______.
A. lose the chance to gaze stars
B. have a higher risk of health problem
C. have less exposure to white light
D. are to blame for light pollution
俗称“空气开关”的是()。
A. 低压断路器
B. 低压刀开关
C. 刀熔开关
D. 低压负荷开关
The word ”dimensions” in the last paragraph possibly means________.
A. directions
B. aspects
C. lessons
D. ambitions
What is incredible about a child is that______
A. he is born with the capacity to speak
B. he has a brain mole complex than an animal's
C. he can produce his own sentences
D. he owes his speech ability to good nursing
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