1. 1. Dinosaurs are classified as reptiles , although some appear to h a ve been warms-blooded A B C D Answer : C Reason : it should be replaced by “some appeared” because ‘are classified’ is a past perfect. 2. 2. Every fuel has their own particular temperature at which it begins to burn. A B C D Answer : D Reason : ‘which’ explained about the things, so after ‘which’ you can’t put ‘it’ 3. 3. The hormone insulin controls by the amount of sugar in the blood which A B C provides energy for the body. D Answer : B Reason : ‘the amount of sugar’ is wrong, because hormone insulin isn’t being controlled by sugar . 4. 4. P