Match the parts of sentences in column A, B and C to write four complete sentences.
Column A | Column B | Column C |
---|---|---|
(a) Air pollution | (i) are | (i) from the vehicles is the main cause of it |
(b) There | (ii) must be taken | ii) to control this pollution |
(c) Black smoke which | (iii) is | (iii) a number of reasons behind this pollution |
(d) Immediate steps | (iv) is emitted | (iv) the most dangerous form of pollution |