Giúp với.

1 They will inform you the result of the exam by letter.

`=>` You will be informed the result of the exam by a letter.

`=>` The result of the exam will be informed to you by letter.

2 When will the shop be opened?

`=>` When will they open the shop?

3 They will serve fish to the guests about ten minutes from now.

`=>` Fish will be served to the guests by them about ten minutes from now.

4 They have sold thousands of CD machines since 1980.
`=>` Thousands of CD machines have been sold by them since 1980

5 That company will publish a textbook next year.

`=>` A textbook will be published by that company next year.

6 My friends told me to change the way.

`=>` I was told to change the way by my friends.

7 Shakespeare wrote many famous plays.

`=>` Many famous plays were written by Shakespeare.

8.Bill will invite Ann to the party.

`=>` Ann will be invited to the party by Bill.

9.Alex is preparing that report.

`=>` That report is being prepared by Alex.