VII. Переведите предложения, обращая внимание на инфинитивную конструкцию Complex Object. 1) We know electric trains to develop high speeds. 2) We believe the tests with the automatically driven trains to have been completed with satisfactory results. 3) Some specialists believe the existing kinds of motive power to be unable to meet the requirements of passenger traffic in the future. 4) We know some signals to be operated by hand others to be automatic. 5) The passengers waiting for the train could watch the track being renewed.