Self-assessment部分答案
1.左图:Shall we go to the library? / Let's go to the library.
中图:Shall we watch TV?/Let's watch TV.
右图:Shall we go to the bookshop? / Let's go to the bookshop.
2.a. Yes,there is. No,I don't.
b. No,he doesn't.
c. Yes,there is. It's 40 yuan.
d. Yes,I am. I usually go to the park with my friends.