Jim's sister was badly ill ,so he had to ------ his home at once.A.arrived in B.set off C.leave for D.go back 请选择并说明
问题描述：
Jim's sister was badly ill ,so he had to ------ his home at once.
A.arrived in B.set off C.leave for D.go back 请选择并说明
答
B
AC 都是到达的意思
D 是返回的意思
B 是离开的意思
吉姆的姐姐的了重病 所以他要马上离开家（当然是去照顾姐姐了）
答
答案是C 啦,他必须立刻离开回家去.
have to do something,所以,to 后面跟的动词应该是原型；
如果选择 go back,应该是go back home,home 前不应该有his作修饰.
set off 按常理也说不通嘛!