Thetrafficrulessayyoungchildrenundertheageoffourand

问题详情：

 The traffic rules say 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

【回答】

D

知识点：非谓语动词

题型：选择题