31.（ ）

(单选题)What’s six ______ seven? (单选题)The king ______ himself from a leaning tree. (单选题)Hearing his mother’s voice, the child couldn’t wait ______ o (单选题)Most sharks feed ______ fish and other animals. (单选题)What do you think ______ him change his mind? (单选题)She ______ a teacher, but now she is a doctor. (单选题)______ the old man spoke, ______ he became. (单选题)Yangzhou High School sounds ______ a good one. But I would l (单选题)Though he live ______, he doesn’t feel ______ because he can (单选题)The building is taller than ______ one around it.