1. прочтите, перепишите предложения, переведите их на язык. 1. it is important to solve this problem. 2. here is the student to examine this material. 3. he came to the institute to speak to the teaсher of french. 4. e. rutherford was the first to change nitrogen to oxygen by bombarding nitrogen atoms with alpha particles. 5. some of the metals are not active enough to react with water at ordinary temperature. 2. прочтите, перепишите и переведите предложения, обращая внимание на обороты с инфинитивом. 1. the scientists proved this substance to be an element. 2. this problem is expected to have been solved. 3. it is possible for me to do this work in time. 4. every crystal has been found to consist of atoms arranged in a definite pattern. 5. during the experiment we saw the temperature to fall rapidly. 3. прочитайте, перепишите и переведите предложения, содержащие союзы "if", "provided". 1. if the liquid air were allowed to evaporate, different components would predominate. 2. such materials are satisfactory, provided they do not form corrosive chlorides.

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