Перепишите предложения. Подчеркните придаточные подлежащие. Переведите предложения на русский язык:

1. That it is easy to confuse the two notions is indicated by this example.

2. Whether or not this synthesis will take place is not known.

3. How the plus and minus came into use is a matter of considerable conjecture.

4. What has been achieved thus far is insight into econ­omic mechanisms.

5. How pleasant work can be is shown by a simple fact.

6. What a decision problem is must be clearly defined.

7. Whether the methods have been used since then is not known.

8. Whether  this  could be achieved with a triplex mechanization was to be determined.