Underline the interchanging vowels and consonants in the corresponding parts of speech:
nation – national

grave – gravity

provoke – provocative

zeal – zealous

supreme – supremacy

occur – occurrence

advice – to advise

use – to use

a house – to house

an excuse – to excuse

a device – to devise

loose – to lose

close – to close

1we  went  to the skating-rink  yesterday. 2 they  grew  even grapes in their orchard some years ago. 3  last week  they  hung  a new mirror in the bathroom. 4 we  had  a delicious dinner at a restaurant  last saturday. 5 she  laid  the table and invited her guests to have dinner. 6 they  heard  some strange sounds behind the door of the house. 7 tom  hid  behind the tree and  watched  the boys sitting by the fire. 8 the young archer  hit  the aim/target. 9 the students  held  a meeting on friday. 10  he  fell  down and  hurt  his leg. 11 their granny  kept  a cow and some rabbits on the farm. 12 she  knew  very well that  boy who lived next door to them.  13 he  knew  a lot of poems by heart. 

1)  i used to live in the country, but now i don't

2)  did you use to wear glasses?

3)  they didn't use to do any homework.

4)  he used to have a motorbike

5)  we used to play in the park when we were little.

6)  she used  to cry  a lot when she was a baby

правильность гарантирована на 99%

lewis and ben were playing paper planes. mery and laura were looking through the window. julia was cleaning the blackboard. alice was combing her hair. josh was reading the newspaper. susan was drinking the juce. peter was doing crosswords. tara and melany were watching the photos. denis was sleeping. rodger and callum were eating chease.

i throw my pan, put it up please/

i'll be waiting you inside the theather

let's meet outside the cinema

they lived in 16-17 centuries