И. А. Курбасова Е. И. Силантьева

2. Используя сигналы сказуемого, найдите подлежащее и сказуемое в главном и придаточном предложениях. Опре­делите место опущенного союза which и переведите пред­ложения

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Образец: The operations which the computers can perform are almost unlimited. Операции, которые могут выполнять ЭВМ, почти безграничны.
1. The engineering difficulties the Soviet metro builders encountered were great and complicated. 2. The voltage of the electric current (ток) can be changed by means of an electrical device'.we call a transformer. 3. The loud speaker system' the' railroads use informs the passengers of the incoming and the outgoing trains. 4. The electric energy our railways are supplied with is produced at the central power stations. 5. The new material the scientists are experimenting with will be used in rolling stock construction. 6. The divisions most railways are divided into simplify , the problem of directing train movements. 7. The light sig­nals the driver can see on the locomotive's control panel show whether the section ahead is clear or occupied by another train.