Ⅰ. 单项选择（30分）
( )1. _______ has China been in the WTO?
Ever since 2001.
A. How long B. How soon
C. How many D. How often
( )2. —What’s your favourite season?
— _______ Everything starts to grow and flowers begin to come out.
A. Spring B. Summer C. Autumn D. Winter
