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A. Two years ago, Mr Hong went to work by car. Now he goes to work by bike. It^'s good for his health and the environment.

B. In the past, people washed clothes by hand. Now they use washing machines.

C. In the past, children played hide-and-seek in the fields. Now they play computer games at home.

D. In the past, people got water from a well. Now they get water from the tap.