看图完成下列对话，每空一词。
1. A: do you study for a test?
B: By ______ on the computer.
A: That must be fun.
2. A: Do you learn English____ reading the textbook?
B: , I _ ___. I learn English by______ to my classmates.
3. A: Look, the boys are . What ______ you ______?
B: I'm reading an English book.
A: Do you study ______ by reading books?
B: Yes, ___ __.
