The traffic rule says young children under the age of four and less than 40 pounds must be in a child safety seat.
A. being weighed
B. to weigh
C. weighing
D. weighed
网友回答
A. being weighed
B. to weigh
(答案→)C. weighing
D. weighed
解析：考查分词做定语。本题中的动词weigh（重…）与前面的名词young children构成主动关系，故使用现在分词短语在句中做定语。句意：交通规则说四岁以下和体重不到40磅的儿童一定要坐儿童安全座位。故C正确。