почему рассказ называется любовь к жизни?

Якою є площа квадрата,якщо його периметр дорівнює 24 см ?

1.       I understand that you are busy now. (Must, Should, Do…have to) … I phone later?

2.       The swimmer pulled together all his efforts and (could, might, was able to) … get out of the whirl.

3.       Shakespeare (must, could, can’t) … have been to the USA because it had not been founded by then.

4.       I think that you (ought to, can, have to) … help this old and miserable man.

5.       My niece (can, might, should) … visit us this summer.

6.       We (must, can, could) … go to Venezuela for our holidays. What do you say?

7.       For changing over the trains you (need to, is to, ought to) … buy another ticket.

8.       With new technology you (should, can, might) … cut communication costs considerably.

9.       You (could stay, could have stayed, needn’t have stayed) … at my place when you visited London. Why didn’t you do it?

10.   Your hands are full. (Shall, Will, Should) … I help you?