Выберите функции причастий, соответствующие данным предложениям.
 
1.  The question being too difficult, no one could answer it.
2.  Gas consists of a number of particles moving at a tremendous speed.
3.  While melting the snow keeps the same temperature.
4.  Operating characteristics of goods are usually given in graphical forms.
5.  Being started in time, the preparations for the test are over.
6.  The radio set bought by you is often out of order.
7.  An electronic computer forms a complex device when viewed as a whole.

a)  правое определение;
b)  левое определение (действительный залог);
c)  независимый причастный оборот;
d)  обстоятельство.