1- By the end of the year, I (save) ………………………………………… $5oo. 2- By this time next year, my father (spend) ….…………………………………… five years in France. 3- Scientists (possibly/develop) ………………………………………………… a new vaccine for AIDS in twenty years’ time. 4- They (arrive) ………………………………………… in Canada by now. 5- By the end of this week, I (revise) ……………….………………………………. all my Math’s lessons. 6- When you get to the airport, Paul(already/arrive) …………………………………………… 7- I (leave) ……………………………………. by seven. 8- Kate (not finish) …………………………………………………………………. the essay by the weekend. 9- At this time next year, they (build) ……………………………………………. a new hospital in our city. 10- Peter (perfect) …………………………………………his English by the time he comes back from London. 11- In five years’ time I (graduate)…………………………………. from university. 12- I think Jane (receive) ……………………………….……………………. my letter by Tuesday. 13- He (live) ……………………………………………… for 10 years in Rome by next July.

1- By the end of the year, I (save) would have saved  $5oo.

2- By this time next year, my father (spend) would have spent five years in France.

3- Scientists (possibly/develop) would possibly have developed a new vaccine for AIDS in twenty years’ time.

4- They (arrive) must have arrived in Canada by now.

5- By the end of this week, I (revise) would have revised all my Math’s lessons.

6- When you get to the airport, Paul(already/arrive) would have already arrived

7- I (leave) will leave by seven.

8- Kate (not finish) would not have finished the essay by the weekend.

9- At this time next year, they (build) would have built a new hospital in our city.

10- Peter (perfect) have perfected his English by the time he comes back from London.

11- In five years’ time I (graduate) would have graduated from university.

12- I think Jane (receive) had received my letter by Tuesday.

13- He (live) would have lived for 10 years in Rome by next July.

Explanation:

The question is about the best possible way to complete the sentences. This would show future action that could have been done or the past actions that was achieved. This is completed by using would, should, have etc and the appropriate verb tense.

what is the sentence?

demonstrative would be the answer.