I could not wait for you any longer,it is dark and I()a.must go b.must have gone c.had to go

题目

I could not wait for you any longer,it is dark and I()a.must go b.must have gone c.had to go
d.should go
答案是C,为什么,不是have to吗
His house is() a stone's throw() the school.
翻译
a.with for b.within ofc.for from d.within to为什么

答案

有have to 、has to、had to 三种形式,如果是it was dark,要选C,不知你是否打错了.
她的房子离学校（一箭）一步之遥.
.within a stone's throw of ……（离…… 一箭之遥）
也可以说
His house is within a stone's throw (from) the school.