Why do we sleep? from birth, we (spend) a third of our lives asleep but scientists srill (not/know) exacly why.
why (humans/have) problems sleeping? in modern society, many people (not/get) the recommended seven or eight hours a night. we (work) long hours and we rarely (go) to bed at sunset.
why (we/sleep) differently? it (depend) on the time of year and also our age. teenagers always (need) more sleep than adults. lots of elderly people (not/sleep) longer than four or five hours, but they often (take) naps during the day.

tall

thin

active

thick

oval

used-past simpleincreased-past simple  increasing-present continiousdominate-present simplemade-past simple 

there are many flowers in the garden.

the sun is bright.

her eyes are very beautiful.

1.) it (was) sunday yesterday and they (were) at home.

возможен и этот вариант:

  it (was) sunday yesterday and they (weren't) at home.  2.) kim (was) at her grandmother's yesterday.

возможно:

  kim (wasn't) at her grandmother's yesterday.  3.) she (is) at home.  4.) mum and dad (were) at work yesterday.  возможен и этот вариант:

  mum and dad (weren't) at work yesterday.  5.) they (are) in the village.