A have opened   B closed      C rebuilt    D setup<br/>

A takes place only during a particular season B occurs only during the night C is a daily practice D only happens when a species becomes over-populated

A over-eating B calcium deposits C a body chemical D a lack of water

A a sleep to avoid eating B a temperature in cold weather C a sleep in the cold season D an animal to practice sleep in winter

A many animals die during hibernation B hibernation protects animals during the wintertime C scientists feel puzzled about hibernation D some bats hibernate and others do not

A argued bitterly with his employer B was angry and gave up his job C was sorry for what he did D was sad and self-pitying

A people may have a mistaken idea of what you did B you should welcome other people's opinions C people may discuss it with you in depth D you need time to understand yourself<br/>

A to take no notice of the criticism B to argue with your boss C you need to change your job D you've done nothing wrong<br/>

A didn't like her appearance B refused to change his opinion C made an unreasonable criticism D refused to talk to her about the criticism<br/>

A twins understand each other very well B twins are slow to learn to talk C twins are unlikely to do less well at school than other children D there exists more communication between twins