[P9-50]
Some fish have a greater __________ for acid water than others.
A) tolerance
B) resistance
C) dependence
D) persistence
注：1. tolerance 忍耐，忍受
2. resistance 抵抗
3. dependence 依赖
4. persistence 恒定不变，坚持，持续
[P9-51]
There was once a town in this country where all life seemed to live in _____ with its surroundings.
A) coincidence
B) harmony
C) uniform
D) alliance
注：1. harmony 和谐，协调
2. coincidence 巧合，一致
3. uniform 制服；统一的，一致的
4. alliance 联盟
[P9-52]
The court considers a financial ______ to be an appropriate way of punishing him.
A) payment
B) obligation
C) option
D) penalty
注：1. penalty 惩罚
2. payment 付款
3. obligation 责任，义务
4. option 选择
[P9-53]
It is true that____ a wild plant into a major food crop such as wheat requires much research time.
A) multiplying
B) breeding
C) magnifying
D) generating
注：1. breed 生养
2. multiply 增加
3. magnify 放大，扩大
4. generate 产生