Malaria - a disease that you can get from the bite of a particular type of mosquito, hose - a long plastic or rubber pipe, used to direct water onto fires, pip - one of the small seeds of a fruit such as an apple or an orange, forwards - towards the direction that is in front of you, knock over - strike or collide with someone so as to cause them to fall to the ground, backwards - away from one's front; in the direction of one's back, come up with - produce something, especially when pressured or challenged, discovery - the action or process of discovering or being discovered, petrol - a light fuel oil that is obtained by distilling petroleum and used in internal combustion engines; gasoline., do research - work that involves studying something and trying to discover facts about it.,

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