Variant 1 You could have come first and won the race if you … faster

16. It costs about thirty dollars to have a tooth … . It isn`t cheap.

A) filling B) fill C) filled D) to fill

17. “Shall I open the door?” He offered … the door.

A) that I opened B) that he open C) open D) to open

18. Will you supply us with all the papers … before we start discussing the contract?

A) requires B) requiring C) required D) to require

19. The Internal Revenue Service makes all Americans … their tax forms by April 15 every year.

A) to fill B) filling C) fill D) filled

20. Do you know how long he … in Portugal before he moved to Turkey?

A) was living B) had lived C) has been living D) lived

There are few places in the world where you can see many colourful parrots in the wild. The most famous is at the Manu River in southern Peru. Early each morning a thousand or more parrots come to a bank of the river. Most of them are red and green, but there are other kinds with yellow and blue or scarlet feathers mixed in. Bird watchers come from all over the world to see the parrots. The idea of all those parrots coming together leads to a question: what bring them? Just watching gives a surprising answer. They are eating dirt from the river bank but not just any dirt. They carefully pick out a special layer that runs along the bank. We eat carefully prepared foods and for us the ideas of eating dirt seems distasteful. But for wild animals it is common enough. There is even a special word for it: geophagy.