选词填空。
（一）
Today is _________.It’s sunny. Grandpa is _________ a letter. Grandma is cooking _______in the ________.Dad is answering the _______.Mom is cleaning the _______. I am reading a _______ in the study. My little sister is _______to music. Everyone is busy.
（二）
（1）―What____  ____ doing?         
－I’m taking pictures.
（2）－____  _____ watching insects?
－Yes, they are.
（3）－Is he writing a report?
－Ｎo,______ ______.
（4）－Is she counting insects?
－Yes,______ ______.