根據(jù)上下文補(bǔ)上所缺的單詞的ing形式，使短文完整。

write；do；cook；clean；wash；answer； listen；draw；read；work

Everybody is very busy.
（1）Grandpa is

writing

writing

a letter.
（2）Grandma is

reading

reading

a book.
（3）Dad is

working

working

in the study.
（4）Mom is

cooking

cooking

dinner in the kitchen.
（5）Brother is

listening

listening

to music.
（6）Sister is

cleaning

cleaning

the room.
（7）I am

drawing

drawing

pictures.
（8）Uncle is

answering

answering

the phone.
（9）Aunt is

washing

washing

clothes.
（10）Cousin is

doing

doing

homework.