Parents________send their children to school when they reach six years old.A．cou

题型：不详难度：来源：

Parents________send their children to school when they reach six years old.

A．could	B．were able to
C．ought to	D．would

答案

C

解析

句意：当孩子满六岁时，家长应当送孩子去上学。根据语境可知，应填ought to，表示有责任，从法律或道义上“应该”做。