——Can I help you? ——
A. No, I don’t want any help B. Yes, please help me
C: You’re right D. Yes, please
You must stop and wait for your turn when you see the sign______.
A.
B.
C. 
Mr. Green ____ go to bed ____ he finished his work last night.
A. does; until B. don’t; until C. didn’t; until
when I heard the bad news I couldn’t help ________ .
A. laughing B. dancing C. crying
Kate doesn’t run as ________ as Jim.
A. fast B. fasterC. fastest
------What kind of ticket do you have?
------ We have tickets$105 the hard sleeper.
A. at; for B. for; at C. at; to