问题补充:
The parents are by law to send their children to school.
A. demanded
B. required
C. requested
D. called
答案:
A. demanded
(答案→)B. required
C. requested
D. called
解析:考查动词辨析。require是及物动词,指正式的“要求,命令”希望得到遵守;request也是及物动词,要求,请求,语气较弱。Demand需求,查询,语气相对严肃、强烈。Call呼叫,召集。句意:法律要求父母必须送孩子去上学。故选B。