1. They will have eaten all dishes by the end of the lunch.
2. The waiter will have served us by that time.
3. We will have ordered some Chinese food from take-away before you join us.
4. By this time tomorrow children will have eaten their lunch at the fast food café.
5. I will have chosen a cake for my mother’s birthday by the end of the week.
6. Students will have enjoyed their hamburgers by the end of the break.
7. Anna will have tasted the local dishes before she leaves the country.

1. All dishes will have been eaten ( by them) by the end of the lunch.

2. We will have been served by the waiter by that time.

3. Some Chinese food will have been ordered by us from take-away before you join us.

4. By this time tomorrow children's lunch will have been eaten ( by them) at the fast food café.

5. A cake will have been chosen by me for my mother’s birthday by the end of the week.

6. Students' hamburgers will have been enjoyed (by them) by the end of the break.

7. The local dishes will have been tasted by Ann before she leaves the country.