1.When Mary arrived at the party,most of the guests___
A)already left B) have already left
C)had already left
2.They___ to America last summer
A)had traveled B)have traveled
C)traveled
3.My sister is used___to bed early
A)to go B)to going C)going
4.As he___home from work,he ran into is boss
A)walked B)was walking C)had been walking
5.She was upset because she___the exam
A) won't pass B) hasn't passed
C) hadn't passed​