35. -Just make yourself at home and help yourself.

-_________.

A. No, thanks.　　　　　　 B. Thank you for your great treat.

C. I’m not hungry.　　　　　 D. Thank you for your invitation.

34. This is an illness that may result in total blindness if _________.

A. being left untreated　 B. left untreated　 C. not left treating　 D. not having left untreated.

33. Many Senior High School teachers _______ under the pressure of work.

A. have broken up　 B. have broken down　 C. have built up　 　D. have broken off

32. Put flowers in warm rooms to _______ them _______ the freezing cold.

A. stop; from　 B. keep; from　 C. protect; from　 D. rescue; off

31. _______ there yesterday, I could have asked him not to do so.

A. If I were　　 B. Had I been　　 C. If I was　　 D. Was I