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    Timeline

                             Things that are gifted by nature are called natural things.
                             Things made by human are called human-made things.

                             Machines help us do our work easily and quickly.

                             Computer is a smart machine used to do many tasks.

                  A.  Choose the correct option.

                         1.  Which of these is a human-made thing?

                                   a.                                            b.

                                   c.                                            d.

                         2.  Which of these is a natural thing?

                                   a.                                            b.

                                   c.                                            d.

                         3.  Which of these is a smart machine?

                                   a.                                            b.

                                   c.                                            d.

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