Use will are/is going to or the present continuous. you (trip) over that toy!

You are going to trip(trip) over that toy! present continuous -   запланированное действие на будущее, нельзя запланировать : споткнуться об игрушку"

They build  houses  every  year. they are building a house now. they will  built  this house next year. by the time  she  comes,  they have already  built  a house. when he arrived in  this city,  they … какая-то ошибка в варианте

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.