Look at the following sentences. chose the correct word in italics.
1. julia’s report has/ have been discussed.
2. did/ has your mobile phone been repaired yet?
3. an amazing new medicine has been/ be discovered in america.
4. where is the secretary? the document has not been prepare/ prepared yet!
5. are/ have those letters been delivered?
1 has
2 has
3 has been
4 has not been prepared
5 Have those letters been delivered?