1.We are always busy____the final examination.
A with B on C before D for
2.She was surely not the first or the last____the airport that day.
A reached B reaching C had reached D to reach
A
第一题使be busy with sth的固定结构,解释为忙于做...
D
第二题是一道非谓语考题,也是一个固定结构
the+序数词+to do sth,固定用不定式的,不能用别的形式
对某人心存感激
be thankful to sb for sth
be grateful to sb for sth
有不会的可以再问我