Ответ:

1. Tom has just arrived at the airport

2. They have not written the test yet

3. We have not already seen this film

4. Have you translated the text?

5. Pam has not bought a loaf of bread yet

6. Has she helped her mother to cook dinner?

1. Has he alredy heard this song?

2. Liz has not bought a present for her brother yet

3. I have just switched off the TV set

4. Have you already finished your test?

5. We have not seen this performance yet

6. He has won the competition

Объяснение:

Предложения нужно было просто поставить в Present Perfect