Question

1.they first____when they ___at school A.meet,are B.met,were C.are meeting,are D.were meeting,were

2.Bill and Sue go travelling very often, so they____be short of money A.can't B.mustn't C.shouldn't D. oughtn't

Answer 1

1. 选B.   meet 为瞬间动词，所以C.D排除，而first第一次表示已经遇到过,又排除A所以用过去式，第二个空随着也用过去式。

2. 选A.   can表示推测。两个人经常去旅游，所以推测他们不可能会缺钱。