按要求完成句子。
1.I am reading a book in the study. (对画线部分提问)
__________ are you __________ in the study?
2.Mom is in the kitchen. (改为一般疑问句)
__________ Mom in the __________?
3.Alice is running in the garden. (对画线部分提问)
__________ is Alice __________?
4.Is he sitting in the chair? (作肯定回答)
__________, he __________.