语法与词汇23.The boy's father said, " You'll learn what discipline is like when you go into the army. You can't do as you like there, you know, you have to______.
【正确答案】
A
【答案解析】本题考查短语辨析。根据句意和常识判断，在部队里应该服从命令，不能随心所欲，toe the line(循规蹈矩，遵守规定)符合语义，故答案为[A]项。stay in the ring意为“不要放弃”；run the race意为“赢得比赛”；keep guard意为“守卫，警戒”。