The existence of different kinds of animals and plants which make a balanced environment is called........

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•  Let me know if any difficulties _______.

• The computer allows us to work fast and _______.

• The workmen made so much ______ that Mr. walker had to spend three days cleaning up afterwards.

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•  The sun ______ the growth of plants.

• Several prisoners _______ from their guards and escaped.

• Well-mannered children have usually been properly _____ by their parents.

•  The girl’s father _____ to buy her a car if she passed her examination.

• Wolves were _______ mournfully in the nearby forest.

• Dave has a good______of humor.

• The actor enjoys giving ______ of poems by his favourate poets.

•  Please sign your name here on the _______ line.

• Most things are now mass-produced rather than ______.

• _________ is a building in which movies are shown.

• He offered to ______ her a hand as the suitcase was too heavy for her to carry.

• It's hard work looking _______ three children all day.

• He must give us more time, ______ we shall not be able to make a good job of it.

•  This blue door was _____ painted green.

• You are not allowed to use the ______ after eleven o’clock at night, as it makes too much noise.

• Yesterday, we had a discussion _____ different cultures.

• The terrified hunter, ______ in the arms of a huge bear, fought desperately to loosen its grip.