Choose the correct answer:
1.Peter(this/'s/x) school is small. 
2.('s/is/it) Nam's school big?
3.(Where/How/Which) grade is he in? 
4.(Which/What/What time) dose he do every morning? 
5.This is Mai's house. (They're/Those are/It's) small. 
6. Where is your classroom? It's (on/in/at) the second floor. 
7. It's (a big house/a house big/big house)
8. How many floors (are there your school/your school has/does your school have)?
9.She (brush her teeth/washes her face/get dressed) at 7.30
10.Is your school yard big? (Yes, they are/No, you aren't/No,ít isn't)