aging...Some think that a woman's body cells have a tendency(倾向)to age more slowly than a man's"可知，本段主要讲了基因与衰老的关系。所以C项正确。

　　5．解析：选E　空处的前两句谈及了两个观点。所以E项正确。

　　Ⅱ.完形填空

话题 难度系数 词数 建议用时 人际关系 ☆☆☆ 286 17′ 　　(2018·石家庄联考)Once upon a time there were two friends who lived in a palace with their families.They worked in the__1__of the King.One of these boys knew a girl he__2__so much that he wanted to give her a present.

　　One day，he was__3__with his friend in the main palace hall when he saw a big vase__4__the loveliest flowers.You could imagine how__5__he was at that time.He decided to take one to give it to the__6__，thinking that no one would see him do so.He did the same thing the next__7__，and the next，and the next...until，one day，the King noticed how few flowers were__8__in the vase.He was so__9__that he called everyone in the__10__to assemble(集合)．

　　__11__they were all before the King，the boy thought he should say it had been him who__12__the flowers.However，his friend told him to be quiet，because the King would be__13__angry with him.But the boy was paralysed(瘫痪)with__14__.When the King came near he decided to confess.

　　__15__the boy said that he had done it，the King got__16__at once.But on hearing what the boy had done with the flowers，a__17__appeared on the King's face，and he said，"I couldn't have__18__of a better use for my flowers."And，from that day，the boy and the King became great__19__.They went to the vase and took two of those wonderful flowers，one for the girl，and the__20__for the Queen.

　　[语篇解读]　宫廷里一位男孩为了给自己心爱的女孩礼物，偷了皇宫里的花。当国王要查明是谁偷了花的时候，那位男孩主动承认，因此得到了国王的谅解。并且他们也成为了好朋友。

　　1．A.service　　 B．honor

　　C．memory　　 D．need

　　解析：选A　考查名词。句意为：他们为皇帝服务。in the service of意为"为......服务"。根据下文的语境可知，他们是在为皇帝服务，故选A项。

　　2．A.hated　　 B．loved

C．envied　　 D．moved