12. Переведите предложения, обращая внимание на перевод условных придаточных предложений и союзов:

1. If the geological and prospecting indications are known, it is possible, even before prospecting proper begins, to forecast not only the type of economic deposit that may be found in the given conditions but also the associated elements and the whole complex of forecasting minerals.

2. Provided the geologists make use of proper prospecting methods, they will get necessary results.

3. On condition that different types of ores are to be tested separately each sample should represent a definite type of ore.

4. Unless the face is directly connected to the upper level, the combine does not cut the face for its whole length.

13. Заполните пропуски соответствующей формой глагола в скобках:

1. Unless metamorphic rocks (to be studied) carefully, geolo­ gists cannot be sure of their origin.

2. If the mass of magma (to be) large, the rate of cooling will be slow.

3. If the earth (to be made) of the same material from the sur­ face downward, its density would vary with pressure.

4. Provided geological conditions permit, efficient coal face operations (to be) possible.

5. We really will not survive unless we (to start) working on cleaner, safer sources of energy.

6. If you learned to type, you (to find) the job quite easily.

7. If he were here, I (can explain) to him myself.

8. They would have been here by now if they (to catch) the early train.

9. I (not to believe) it possible, if I hadn't seen it happen.

14. Соедините главные предложения с придаточными:

1. It is possible to use trenches a) provided at some distance for exploration from the floor there is

a waste bed which must be separated from mineral.

2. Mine workings are considered 6) if the latter is blended with to be productive bituminous coal.

3. Rock will not easily cleave в) on condition that the

thickness of overburden is small.

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4. A bedded deposit is to be r) unless its schistose structure worked by underground is disturbed.

mining

5. Bituminous coal will improve д) if they are driven with a coking quality of anthracite view to extracting useful

mineral.

6. The cutter-loader will cut coal above the floor

e) if it lies at a great distance from the surface.

15. Найдите в тексте а условные предложения и переведите их.

16. Переведите предложения, используя предлагаемые слова и сочетания слов:

useful mineral; to drive mine workings; exploratory and productive mine workings; barren (waste) rock; It Is necessary; to contribute to; both ... and; a number of; the output

1. Горные выработки могут быть разведочными и эксплуа­ тационными.

2. Горные выработки могут проводиться как по полезному ископаемому, так и по пустой породе.

3. Для разработки более глубоких частей пласта необходи­ мо проводить ряд подземных выработок, которые могут быть вертикальными, горизонтальными и наклонными.

4. Механизация горных операций способствует увеличению добычи полезного ископаемого.