22. Some of the doctors are paid almost _____ as the nurses.

　 A．twice as much　　 　 B．much as twice　　 　 C．as much twice.　　 D．as twice much

第一节 语法和词汇(共20题，每小题1分，满分20分)

21. It is said that more than two hundred students have ______ the discussion.

　 A．joined　　 　　　　　　　 B．joined in　　 　　　　　 C．joined to　　 　　　　 D．joined up