I ————————- for five hours. a) Have been working ...

★ Passive and Active Voice

I ————————- for five hours.

a) Have been working

b) Has been working

c) Was working

d) Am working

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Change into passive: “You must fasten the seat belt.”

a. The seat belt needs fasting by you .

b. The seat belt must be fasten (by you).

b. The seat belt must fasten (by you).

d. The seat belt must have fasten by you.