1)what has Nina already done?
2)Where have his parents stayed?
3)What has Nick bought for his parents?
Объяснение:
Ex 1
4
6
1
5
7
2
8
3
9
Ex 3
1 Age, sex, heredity and race are some of the factors that might increase the risk of getting a heart disease.
2 The older you get, the more likely you are to develop heart disease.
3 Men develop heart diseases earlier than women do. The gap begins to narrow down at around the age of 65 after women experience menopause.
4 Black Americans are more likely to have a heart disease than white Americans. Black Americans have higher average blood pressure levels.
5 Some of the effects of smoking are clotting, constricted arteries and reduction of oxygen supply.
Smoking is a greater coronary risk factor in women than in men because it eliminates the natural protection women obtain from hormone estrogen.
It is worth giving up the habit because coronary risk declines rapidly within a few years of stopping.
6 High in fat foods are better for eliminating coronary risk factors.
30 percent of fat of your calories is recommended daily.
Объяснение:
ответ:1.They have written three letters already.
2.She has lived here all her life.
3.I have worked here since i graduated school.
Объяснение: