选择合适的句子补全对话. X: Excuse me. 1. N: It's o

N: It's one forty.

X: It's time to go to school.

N: But you begin your first class at two thirty in the afternoon.

X: 2._________But I must leave early today.

N: Are you on duty today?

X: No. 3._________

N: Where's your bike?

X: It's broken and I leave it at home.

N:4._________

X: Thanks a lot.

N: 5._________