21.
Please lend me . . . . . . . . dollar.

22.
We study in . . . . . . . . same school.

23.
. . . . . . . . higher you climb . . . . . . . . colder it gets.

24.
Yesterday I saw . . . . . . . . owl outside the window.

25.
There are sixty seconds in . . . . . . . . minute.

26.
It is . . . . . . . . very popular dancing room.

27.
I don't like . . . . . . . . bananas we bought yesterday.

28.
. . . . . . . . girl from . . . . . . . . farm came once . . . . . . . . week to help clean . . . . . . . . house.

29.
A demonstration is an act of showing by giving proof or . . . . . . . . evidence.

30.
. . . . . . . . Sahara is in the northern part of Africa.