Exercise I : Choose the best answer .

1. They (go) to school.

                  go

                   goes

                   gos

                   going

2. Johnny (clean) the floor every day.

              cleanes

                       cleans

                       clean

                       cleanies

3. I (drink) beer every night.

                       drink

                      drinks

                       drinking

                       drinkes

4.  Jack (swim) in the river every friday.

                       swimms

                      swims

                       swimes

                        swim

5.  Jim (sleep) at 6 o'clock every night.

                        sleep

                       sleepes

                        sleeps

                        sleepies

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