Раскрыть скобки 1. the teacher asked his students if hydrogen and oxygen (to combine) chemicallyand (to form) molecules of water.2. they (not to know) that some engineers already (to repair) the tubes which usually(to use) for experiments.3. some years ago my younger brother (not to know) if he (to enter) the institute ofphysics and techniques or the institute of priority technologies.4. the lecturer told us that i-pads, computers, laptops, wireless internet modems andsome other useful devices (to use) everywhere in the world nowadays.5. she (to ask) the lecturer when newton (to write) his famous book "the principia".ii. express the following sentences in the passive and translate them. ​

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