1 these are their motives for doing it
2 the river widens considerably as it begins to turn west
3 henry cannot resist the lure of drugs.
4 these programmes are of immense value to old people.
5 a great deal has been done to remedy the situation
6 john is collaborating with mary in writing an article
7 he is determined to consolidate his power
8 many scientists have been probing psychological problems
9 hearing problems may be alleviated by changes in diet and exercise habits
10 and the cars are tested for defects before leaving the factory
11 the food is insufficient for three people.
12 thousands of people perished in the storm.
13 but in the end he approved of our proposal
14 for young children，getting dressed is a complicated business.
15 in britain and many other countries appraisal is now a tool of management.
1 a motive：动机;reason：理由。这两个词意思比较接近。there is no reason to doubt his word.没有理由不相信他的话。excuse：借口。answer：回答;plan：计划。
2 c widen和broaden都有"拓宽"的意思。twist：弯曲;stretch：延伸。the forests stretch for hundreds of miles.森林绵延数百英里。bend：弯曲。
3 c lure：吸引。temptation：吸引。这两个词意思相近。abuse：滥用;flavor：滋味：consumption：消费。
4 d immense和enormous都有"巨大的"意思。it was an enormous disappointment.此事太令人失望了。natural：自然的;tiny：微小的;fatal：致命的。
5 b remedy：补救;improve：改进。这两个词意思相近。herbal medicine can be used to improve our health.草药可用于增进我们的健康。maintain：保持;protect：保护;assess：评估。
6 a collaborate：合作;勾结;cooperate：合作。 she has agreed to cooperate with the police in the investigation.她同意在调查中跟警察合作。compete：竞争。combine：合并;argue：争论。
7 a consolidate：巩固;strengthen：巩固，加强。to strengthen his position in parliament.he held talks with leaders of the peasant party.为了加强在国会中的地位，他跟农民党的领导人进行了会谈。control：控制。abandon：放弃;exercise：行使。
8 b probe：探索;explore：探索。这两个词意思很相近。both parties are exploring ways of settling the