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1. We _______ on the Moon in 2050.

     A. might live               B. have lived                   C. live                      D. are living

2. My father ___________Japan three times.

    A. visit                         B. will visit                      C. visited                 D. has visited

3. ___________watch TV too much . It’s not good for your eyes.

   A. Do                            B. Don't                            C. Please                 D. Can't   

4. Mary could do sums_________the age of 7.

     A. at                           B. from                               C. in                       D. to   

5. If we walk and cycle more, there __________ less air pollution.

      A. are                            B. was                           C. have been            D. will