unit12

　　1. This substance _______________(反应速度是另外那种物质的三倍).
　　2. Be quick, _______________(否则等我们到达教堂时婚礼就结束了).
　　3. The war went on for years, _______________(夺去了成千上万人的生命).
　　4. (无论理由是什么)，we cannot tolerate this disloyalty.
　　5. The population of elderly people is increasing rapidly because people are living longer than before___ (发达国家尤为如此).

　　1.【答案】reacts three times as fast as the other one
　　A.three times as long as B.twice longer than C.three times the length of
　　2.【答案】or the wedding will have finished by the time we get to the church
　　3.【答案】killing thousands upon thousands of people
　　4.【答案】Whatever be the reasons for it
　　5.【答案】especially in developed countries