—How does your brother study English?

—He studies English          ．

A．by reading the textbook                  B．to read the textbook

C．with reading the textbook                 D．reading the textbook

—How does your brother study English?
—He studies English          ．

1. A.
   by reading the textbook
2. B.
   to read the textbook
3. C.
   with reading the textbook
4. D.
   reading the textbook