The price system is a complex network composed ofthe prices of all the products bought and sold in the economy as well as ofa great number of services

What’s wrong with my computer, Jack?—Let me have a check. OK, it works now.—You mean, nothing wrong with it, ________ ?

Wearing dark glasses can _______ your eyesfrom the sun

32. Buses have routes. They ________ and ________ people at different places on the routes.

Sorry to disturb you, ______ could I speak to you for a few minutes?