根据句子选用所给的词填空。
1.Hi,I’m Mike.I’m a________(A boy B girl)
2.I’m a ________(A teacher B student)
3.Who’s this girl?Oh,she’s my______(A sister B brother)
4.Look! Who’s that ________?He’s my father(A man B woman)
5.Can I have an apple,please?_______(A Certainty B No)