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  3. People are often killed while they are crossing the road. (1) of these people are old people and children. Old people are ofte

People are often killed while they are crossing the road. (1) of these people are old people and children. Old people are ofte

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问题     People are often killed while they are crossing the road.  (1)  of these people are old people and children. Old people are often killed because they usually can’t see  (2)  hear very well. Children are killed because they are  (3)  . They forget  (4)    (5)  they cross the road.
    A moving car, truck or bus cannot  (6)  quickly. If a car is going very fast, it will travel  (7)  before it stops. People don’t always understand this.  (8)  a car is traveling, the longer it  (9)  to stop. It is very hard for a person to know how fast a car is traveling.
    The only safe way to cross the road is to look  (10)  . The right way to cross the road is to walk quickly. It’s not safe to run.
选项 A、after
B、before
C、as soon as
答案B
解析 本题考查的是引导复合句的连词。选项中的after肯定不对，as soon as意义不通。只有before放在句中语法合理，意思通顺。故选项[B]正确。
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