Question

 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

Answer 1

D

解析:

考查非谓语动词。句意：交通规则规定，4岁以下儿童和体重低于40磅必须固定在安全带里。此处“_____ less than 40 pounds”是分词短语作后置定语修饰children，又weigh作为“重量为……”之意时，为不及物动词，故此处用现在分词短语作后置定语，即D项正确。