题目

Complete the sentences with the following phrases. catch on    on purpose    provided that    be aware of    differ from    consist of    get ahead    congratulate…on    focus on    sign up    in the absence of    hold the key to （1） I don't to what he is saying. （2） She broke the dish just to show her anger. （3） I don't mind Mary coming with us he pays his own meals. （4） Most smokers perfectly the dangers of smoking. （5） Humans other mammals in their ability to speak. （6） Class 13 4 lovely girls and 55 hard-working boys. （7） She soon found that it wasn't easy to in the movie business. （8） any evidence, the police had him go. （9） The weather our success or failure. （10） We our team coming first in the competition. 答案： 【1】focus on 【1】on purpose 【1】provided that 【1】are【2】aware of 【1】differ from 【1】consists of 【1】get ahead 【1】In the absence of 【1】holds the key to 【1】congratulated【2】on

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