Масса 1 дм в кубе стали равна [tex] 7\frac{4}{5} [/tex] кг. Найдите массу стального куба, ребро которого [tex] 2\frac{1}{2} [/tex] дм. 

Тут многовато заданий зато баллов много даю))
1. Задание
Ответьте на вопросики...
1)Whose is this jacket?
1.Mine.
2.You are.
3.John.

2)Are you sure they’ve gone?
1.They’ve been here before.
2.Yes, I agree with you.
3.They left hours ago.
2. Задание
 Вставьте слова в пропуски
Текст номер 1
Jogging, or slow running, is an excellent form of exercise ________ (what,which,who,when) will keep you in good health. You can jog at your own ________(speed,direction,way,time) so it is suitable ________(to,with,for,by)

anyone from a beginner to a top sportsman. You don’t need to go to a special sports centre ________(because,but,therefore,although)

your exercise begins as soon ________ (that,than,when,as)

you step out of the door.

Текст номер 2...
Scientific research shows that an alarming number of adults suffer from sleep ________ (deprivation, denial, disintegration ,dislocation)  which not only causes a loss of productivity at work but also a significant ________(fall, degradation, loss, deterioration) in the quality of their personal lives.

Текст номер 3....
If you have ________ (awkwardness, fuss, hindrance ,trouble) sleeping, the following information may help. If your digestion is a weak _______(fixture, point, element, link)
, eating late at night and then lying down in bed. Eating earlier should help, as should sleeping with your head ________(propped, pinned,set,drawn) up high on a pillow.

Задание 3
Вставьте слова в пропуски:
1)I’ll show you around the city, when you ________ to visit me.
1will come
2are coming
3come 
4will be coming

2)I’d ________ have coffee than tea.
1prefer
2rather
3like
4better

3)He felt tired ________ he had slept for eight hours.
1whereas
2despite
3in spite of
4even though

4)There’s no point ________ knocking at the door - she’s already gone out.
1.for
2.to
3.with
4.in

5) I wish I ________ to go to the dentist this afternoon.
1.wouldn't have
2.don't have
3.didn't have
4.haven’t

6)She said she was in two ________ as to whether to go or not.
1.thoughts
2.minds
3.ideas
4.views

7)You promised you’d come with us, so you can’t ________ out of it now.
1.back
2.move
3.fall
4.slip