A.根据句意和所给的中文提示，写出句子中的单词。
⑴Could you tell me the   (高度) of Qomolangma?
⑵It is well known that the Diaoyu Islands   (属于) to China.
⑶People who eat a balanced diet should be   (健康) than those who only eat biscuits and hamburgers.
⑷The customs in Qingdao are   (相似的) to those in Yantai.
⑸Tom   (准备) for the final exam. Please be quiet!
B. 根据句意，用所给单词的适当形式填空。
⑹He  (be) a volunteer in Ya-an, Sichuan since the earthquake happened.
⑺Mr. Jiang is a learned person, and he has lots of   (know).
⑻The little girl is very kind and she always talks to people  (polite).
⑼All the   (village) living conditions have greatly in recent years.
⑽My teacher did what he could   (make) his class lively.