(a) Fossil fuels can be made in the laboratory. (False)
(b) CNG is more polluting fuel than petrol. (False)
(c) Coke is almost pure form of carbon. (True)
(d) Coal tar is a mixture of various substances. (True)
(e) Kerosene is not a fossil fuel. (False)
Fill in the blanks using the correct form of the verbs in brackets.
My little sister is very naughty. When she ____ (come) back from school yesterday, she had _____(tear) her dress. We _____(ask) her how it had _____(happen). She ______(say) she _____ _____ (have, quarrel) with a boy. She _____ _____ (have, beat) him in a race and he _____ ____ (have, try) to push her. She _____ ____ (have, tell) the teacher and so he _____ _____ (have, chase) her, and she _____ _____ (have, fall) down and _____ _____ (have, tear) her dress.