Modem engines make use of exhaust gas driven turbo-chargers to supply pressurized fresh air for （） and supercharging.

A.make use of
B.have made the use of
C.by means of
D.make advantage of

A.are made of
B.are made from
C.make use of
D.are used to

A.the clearance of the main bearing
B.the diameter of main bearing
C.the hardness of main bearing
D.the tolerance of main bearing