Fill in each blank with the most appropriate word or phrase from the ones listed on Student's Book. Many animals eat plants,(1)________ not many plants use animals as food.(2)________,some plants are not able to get enough food for themselves(3)________ live in poor conditions.How do they maintain their lives then? One of the plants catches insects in its special leaves,which are shaped like pitchers. (4)________ an insect is trapped within a pitcher-like leaf,it dies and is broken down,or digested.(5)__________,the plant gets the food it needs.And there is another kind of plant which has leaves covered with small tentacles.(6)________ ,the tentacles are very sticky.Any insect which lands on a leaf like this gets stuck to it.The tentacles(7)________ slowly close round the insect.(8)________ the insect may struggle desperately,it can achieve nothing (9)________ be digested. There are other plants living on animals.Sometimes the whole leaf is sticky and rolls inwards as soon as an insect happens to come into contact with it;or the leaf has two flaps, each having long teeth,(10)_________ an insect lands on a leaf,the flaps close,trapping it.(11)________ ,they don't have to worry(12)________ they live on.