Jawaban:

1. The black cat (have) a long tail.

(+) The black cat has a long tail.

(-) The black cat doesn't have a long tail.

2. He (come) to our school.

(+) He comes to our school.

(-) He doesn't come to our school.

3. The train (arrive) tonight.

(+) The train arrives tonight.

(-) The train doesn't arrive tonight.

4. You (attend) class twice a week.

(+) You attend class twice a week.

(-) You don't attend class twice a week.

5. I (have) lunch in cafeteria every day.

(+) I have lunch in cafeteria every day.

(-) I don't have lunch in cafeteria every day.

6. Helen (work) very hard.

(+) Helen works very hard.

(-) Helen doesn't work very hard.

7. I (like) sunbathing.

(+) I like sunbathing.

(-) I don't like sunbathing.

8. The dog (chase) the cat all around the house.

(+) The dog chases the cat all around the house.

(-) The dog doesn't chase the cat all around the house.

9. Mr. Smith (work) for a small airline.

(+) Mr. Smith works for a small airline.

(-) Mr. Smith doesn't work for a small airline.

10. Gene usually (sit) at this desk.

(+) Gene usually sits at this desk.

(-) Gene usually doesn't sit at this desk.

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Sorry if my answers are incorrect and unclear, hope these answers help you