The questions that i take from IFL school who i have been studying . A . Choose the best answer

1 Calileo  found that the earth ......... round the sun .
        a . revolves             b . is rlvolving
        c . will revolve         d . would be revoling .
2 Susan .........a cold for over five days.
        a . has                     b . has had
        c . is having            d . was having
3 I still ..... the good  old days when we were at school together .
        a . remembered     b . am remembering
        c . was remembered  d . remember .
4 I ......... of changing my job for some time , but I haven ,  quite made up my mind .
         a . have beem thinking       b . am thinking
          c .  was thinking                 d . had thought .
5 After they ...... dinner , they reyurned home .
            a . were having             b . had
            c . had had                     d . have had
please answers back with true reply . thank for your answers before hand. good luck.