3. перепишите следующие предложения, содержащие оборот there + be. переведите предложения на язык, обращая внимание на вреня глагола to be. 1. there were only a few higher educational establishments which trained geologists and mining engineers in our country at that time. 2. there are many reasons of weathering (эрозия, выветривание} , but much depends on the change in temperature. 3. there is not a single internal support for the roof of this building.