答案与解析

　　1．If　if 引导条件状语从句，意为“如果”。

　　2．used　pesticides 与 use 之间为被动关系，故用过去分词作定语。

　　3．for　be responsible for 对……负责。

　　4．survival　名词作宾语。

　　5．means　根据上下文时态可知用一般现在时。

　　6．why　先行词为reason，定语从句中缺状语，故用why 引导。

　　7．an　表示“数量一”，用不定冠词。

　　8．It　it 代替the British government.

　　9．sooner　根据than 可知用比较级。

　　10．until　until 引导时间状语从句，意为“直到……为止”。

　　Ⅳ.短文改错

　　My name is Julie. As a nurse I work in a school to make sure that our children are health and able to learn. I work with teachers, school doctors and other to offer them some advices and help them when they had difficulties. I enjoy my job because I love being with children. They are very active and lovely. I am very glad stay with them so I feel much young than before. They are honest about what they feel—glad or sad. When children are ill, I try my best to take a good care of them. When they are sad, I always make them happy. They also love me but sometimes give me apples and candies by return.

　　答案

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