Question

 He used to teach in that university and I _________ ride past it on my way to work.

A. would       B. could       C. should       D. might

 

Answer 1

【答案】

 A

have to表示由于客观原因“不得不”，不能分开；ought to等于should，表示“应该”，do在此句中不能用，不能代替have to。