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

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• She began to feel nervous when the train pulled up at the _____ between Austria and Yugoslavia.

• I'm afraid you have no _____ but to come along with us.

•  He will probably be awarded a Nobel prize on account of his _______ achievements in physics. 

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• The main.........is played by Nicole Kidman.

• It is parents' duty and responsibility to _______ hands to take care of their children and give them a happy home.

• Because the company was doing more business, it was necessary to _____ the factory.

• You have to be highly ________ to do well in these subjects.

• After driving for five hours, the driver pulled into ______ for a rest.

• How many countries took part in the first World Cup?

•  We paid  the shopkeeper _____ cash.

• He has impressed his employers considerably and ______ he is soon to be promoted.

• The customs officer didn’t bother to _______ our luggage.

•  The judge said that he was ______ by the high standards of performance by the riders.

• He’s always ______ to his father’s wishes.

• He was a much older tennis player but he had the great ______ of experience.

• I shall never manage to beat John at tennis; we are clearly not in the same ______.

• She has lost her handbag with the _____ sum of $1300 in it.

• She came to England for a year in order to ______ the language.

• It isn’t quite ______ that he will be present at the meeting.

• The crowd stared at the giant and the dwarf as if they were _______ monsters.