根据对话内容用合适单词填空。
A: Who is (1) ________(2) ________today?
B: (3) ________am.
A: (4) ________we all here?
B: No.
A: (5) ________isn't at school today?
B: Zhang Qiang.
A: (6) ________is he?
B: I(7) ________know. But I think he's
(8) ________ (9)________. He looks (10) ________his father.
1. on 2. duty 3.I 4.Are 5.Who 6.Where 7.don't 8.at 9.home 10. after