1 Computers are widely used for controlling (simple - дополнение) all kinds of processes.
2 Driving (simple - подлежащее) a truck in the city is difficult.
3 One of the best ways of keeping (simple - дополнение) the speed steady is using a computer for this purpose.
4 It is difficult to solve some of the present-day scientific and technological problems without using (simple - дополнение) supercomputers.
5 The strange man stopped following (simple - часть составного сказуемого) me.