5. Определите инфинитив в функции обстоятельства цели по месту относительно сказуемого а) To change heat directly into electrical energy we must take two wires of dis-similar metals.
b) To change heat directly into electrical energy is not difficult.
c) To prove any statement it is necessary to make experiments and observa-tions.
d) To prove any statement is a very difficult task.
e) To protect personnel from radiation is a very important task.
f) To protect personnel from radiation nuclear reactors are shielded with con-crete walls.
6. Назовите предложения с инфинитивом в функции подлежащего
a) Тo prolong this discussion is to waste time.
b) To complete a journey round the sun requires nearly 30 years.
c) To complete this experiment he spent much time in the laboratory.
d) Tо lift a weight from the floor is to do work.
e) To give a true picture of the surrounding matter is the task of natural science.