单选题 According to the U. S. National Highway Traffic Safety Administration (NHTSA), car crashes are the leading cause of death among children (51) 5 and 14 years of age. Says NHTSA: "Over 50% of children who die in crashes are (52) by safety devices. (53) , 4 out of 5 children are improperly restrained."
The NHTSA offers a number of safety tips and (54) for those who are accompanied by children while driving. Although laws (55) from country to country and even from state to state, these guidelines may (56) food for thought to many parents and guardians of children. Please check your local laws and do (57) you can to keep your precious baby safe.
The safest place for all children is in the back seat. Infants should be (58) in a rear facing safety seat in the backseat of the car. A child at least a year old and (59) at least 20 pounds may be placed in a forward-facing seat. At 40 pounds, the child can use a "booster seat", which is secured by one of the car's lap and shoulder (60) . At approximately 80 pounds and a height of about four feet nine inches, the child may begin using an adult safety belt.

单选题 A. at B. between C. for D. about

单选题 A. bound B. undefined C. unrestrained D. inhibited

【正确答案】 C

【答案解析】[解析] 这是一道词汇题，考过去分词的意思。unrestrained：不受约束，不受限制，没有带。bound：跳跃；限制；undefined：不明确的，未下定义的；inhibited：羞怯的，内向的。

单选题 A. Of course B. On contrary C. Nevertheless D. In addition

单选题 A. cautions B. forms C. notes D. concepts

单选题 A. work B. vary C. enforce D. affect

单选题 A. give way B. differ from C. serve as D. deal with

单选题 A. whatever B. whichever C. that D. which

单选题 A. tied B. stuck C. surrounded D. placed

单选题 A. weight B. weighted C. weigh D. weighing

【正确答案】 D

【答案解析】[解析] 这是一道语法题，考分词的用法。weight(n)：重量；weighted(aaj.)：有利的；weigh(v)：称重；weighing引导的现在分词短语作定语修饰child。