1.Five minutes earlier,______we could have caught the last t

1.Five minutes earlier,______we could have caught the last train.
A.and B.but C.or D.an order
2.I cannot give you ______for the type of car you sell because there
is no demand for it in the market.
A.an expense B.a charge C.a purchase D.an order
3.We desire that the tour leader ______us immediately of any change in plans.
A.inform B.informs C.informed D.has informed
4.Not _______,the process of choosing names varies widely from
culture to culture.
A.obviously B.surprisingly C.particularly D.normally
5.A man escaped from the prison last night.It was a long time____
the guards discovered what had happened..A.before B.until C.since D.when