The heavy snow lasted for a week, _____ a serious traffic confusion in the whole area.[ ]

Read it aloud _________ your classmates can hear what you say.

ing worked out the program, ________ leave the office.

Exercise is hard to stick to ____, but in the long run, it will do you good[ ]

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