—Sorry, I got a bad cold yesterday.—Every time you are absent, you ________ an excuse.
The people who objected to cloning human beings went on strike and _________ the traffic.
Only after he realized the significance of mastering two languages __________ English carefully.
_________ with common sense can tell the difference between the two.
_________ that the government can lead them out of the financial crisis, people are optimistic about the future of the country.
Recently a survey _______ prices of the same goods in two different supermarkets has caused a heated discussion among citizens.