21. There are many tall green trees on _______ side of the street.
A either B both C all D every
22. Bill’s parents are _______ good at swimming.
A both B all C each D either
23. —The exam was very easy, wasn’t it? —Yes, but I don’t think _______ could pass it.
A somebody B anybody C nobody D everybody
24. There is _______ knocking at the door. Go and see who it is.
A nobody B somebody C anybody D everybody
25. I don’t like the colour of the T-shirt. Would you show me _______ one?
A other B the other C another D others
26. The old woman kept one black dog and two white _______.
A one B ones C those D one’s