1 . which of the following statements is valid ?
- A. There have been fewer changes in the 20th century them in the previous one.
- B. Everyone knew that changes would come very fast .
- C. Most changes have come through the microchip .
- D. It has become impossible to contact friends .
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ক ইউনিট (2007-2008) || ঢাকা বিশ্ববিদ্যালয় || 2007
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