
21.Why does Boise train technicians to learn about many types of equipment?
A.To offer customers better services.
B.To satisfy customers'different needs.
C.To offer high-quality furnace repair.
D.To make furnaces less complex.
22.What does Boise can do for you?
A.Tell you whether to buy a new furnace.
B.Repair a motor vehicle.
C.Help you make costly investments.
D.Offer furnace maintenance for free.