一、单项选择（15分）
( )1.---How do you study _______a test?
----I study _______reading the textbook.
A. for ; for B. for ; by C. by ; for D .by ; by
( )2. I don't know _______.Can you tell me________?
A. how swim; what to do B. how to swim ; what to do it
C. how to swim; what to do D. what to swim; how to do
( )3. Liu Xiang is one of ______ runners in the world.
A. famous B. more famous
C. the most famous D. most famous
