Jawaban:

2. a. the present was bought by Tom yesterday

b. i just got a nice present

c. I bought a present for my birthday

3. a. The beautiful song was sung by Ann

b. She sings the most beautiful song

c. My favourite song has been covered by my friend

4. a. The computer has been repaired by Ben yesterday

b. The computer finally has been fixed

c. My computer is no longer broken

5. a. The tasty cake was made by my sister

b. Me and my sister have finally done baking a cake

c. The cake is tastier than mine