Q.21 Read the following passage and answer the questions that follow the passage, base on the options to each question. Why does one get an unpleasant smell in the steam train?. (The great, adventure of the electric train over the steam train, I think, is that it does not smell. When you're in a train drawn by a steam locomotive, you always have the unpleasant odour of burning coal around you. If you open the Windows to look out at the view and to get some fresh air, your are covered with little bit of coal-ash, which gets into your hair and eyes and soon forces you to shut the window again and withdraw into the impure atmosphere of your compartment. In a tunnel, your misery reaches a peak, for there the smokes is forced into a long tunnel, smells grows worse and worse, while your eyes smart and the electronic light in the carriage grows slim hidden behind the wreathing smoke. Whit an electric locomotive, on the other hand, you can enjoy the view and the fresh air without inconvenience. No file avaiable 1 marks