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. weighed
D. weighing
网友回答
A. being weighed
B. to weigh
C. weighed
(答案→)D. weighing
解析：考查非谓语。young children与weigh为主谓关系用现在分词作定语。 句意：交通法规定四岁以下以及小于40千克的儿童必须坐在儿童座位上。