как из 5 3 получить число 31

Fill in said or told.

и пожалуйста объясните почему?

1.She ............everything.2.She..............them everything.

3.Who...............you this?

4.Who ..............it's cold today?

5.He.................. that the trip was interesting.

6.And then he.........something funny.

7.The teacher..........us to come early.

8.The teacher..........that the text was difficult.

9.The teacher...........to us that the text was difficult.

10."He'llcome at 7o'clock,"she........guickly.

Найдите наибольшее значение выражения 5 cos t - 3

По спилу дерева определите какие листья на нем росли?