20.The traffic rule says young children under the age of four and ____

题目

20.The traffic rule says young children under the age of four and ____
less than 40 pounds must be **a child safety seat
A.being weighed B.to weigh C.weighed D.weighing
我选了a,我觉得小孩子是被称,可是错了,

答案

4岁以下并且少于40磅的小孩必须坐在儿童安全坐位上.可以看AND前后并列,前面under the age of 4做young children 定语,后边也应该是做young children 定语.加上注意时态其实一般现在时.所以选择D