1.He ... never been to America
B.has
2.The house was empty.There...there
A.was nobody
3.If I were rich,I ... buy a house on the beach
B.would
4.When she arrived,he ...
C.had already left
5.I forgot...the light before I left
A.to turn off
6.By the time you finish the class...
A.will have left
7.The room can’t be dirty she...
D.has just cleaned it