77. Metal c_______________ as it cools.　　　　　　　　　　　　　　　　　　　　　　　　　　　

you say that dolphins are much more i_______________ than other animals?

76. My first i______________ of the school is quite big and clean.　　

35. The story sounds ________. So everyone believes it at first.

　 A. being false　　 B. false　　　 C. being true　　　 D. true

34. Susan, ______ university student from Europe, teaches me ______ art in her spare time.

　 A. an; 不填　　　　 B. a; the　　　 　C. a; 不填　　　　　　 D. an; the