二、选择题。（20分）
( )21. I know she won't come to join us unless she_______ to.
A. tells B. has told C . is told D. telled
( )22. —Many tourists _______ to the Great Wall every year. —Yes, that’s true.
A. attract B. have attracted C. are attracting D. are attracted
( )23. English ______ by lots of people as their first language in the world.
A. is spoken B. speaks C. is speaking D. spoke
