30. ---You haven’t lost the ticket, have you ?　　

　 　---_____. I know it’s not easy to get another one at the moment .

　 A. Yes ,I’m afraid so　 　　B. Yes, I have 　　　　　C. I hope so　　　 　D. I hope not

29. Dear Mom, I wonder if you ever knew how much I appreciated _____ you gave me even though I often simply said, “Thanks Mom.”

A. all which　 　　　B. all that　 　　　　　　　 　C. in that　 　　　　　　　　 　D. for that

28. He made a mistake, but then he corrected the situation ________ it got worse.

A. until　　　　　　　　　　 　 B. when　　　　　　　　　 　　 C. before　　　　　　　 　 D. as

27. Was it during the Spring Break_______ you went on a trip to Suzhou?

A. when　　　　　 　　　 　　　 B. that　　　　　　　　　　　　　 C. in which　　 　　　　　　　 D. then