1) The population has increased ________3 percent in comparison with the previous year. a) on b) by c) to 2) The population has increased _________ 42 million people. a) on b) by c) to 3) About 45% ___________ all the school teachers were vaccinated within the first month. a) of b) with c) out 4) Before doing your holiday shopping, keep in mind that the prices may ___________ from store to store: check them out online first. a) vary b) very c) wary 5) An average customer has no idea how to use the lion’s ___________ of these devices. a) part b) section c) share 6) Why do the prices have a tendency to_____________? a) rise b) raise c) lower 7) No economist could ever predict such an ___________ of the real estate market in a remote area like this. a) raise b) increase c) growth

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