Robby: I don't know. Do you have any ideas?
Chris: Why don't we go to the Public Library downtown?
Robby: Why should we go there?
Chris: I want to read some books about robotics.
Robby: That sounds interesting.
3.What does Chris offer?
a.Going downtown.
b.Reading some books.
c.Going to Public Library.
d.Designing an interesting robot.