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,       ___         __.