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
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答案
正确答案:D
解析
此处weigh意为“重”，其后可直接跟表示重量的词语。根据句意可知，young children 和weigh之间是逻辑上的主谓关系，所以应用现在分词的一般式weighing，和空后的less than 40 pounds．一起作后置定语，相当于定语从句 who weigh less than 40 pounds。
