Nturies of grime (грязь) have been deposited, has been under way for several years. 6. there are several techniques for protecting oneself from radiation, that have been worked out by our specialists. 7. the structures humans build undergo chemical and physical
2) Do you travel in winter?-No,we don't travel in winter
3) Does Alice like to visit her grandparents?-Yes,Alice likes to visit her grandparents.
4) Does Bob often go to museums?-No,Bob doesn't often go to museums.
B. 1) Did Tom write a letter yesterday?-Yes,Tom wrote a letter yesterday.
2) Did Bob eat his lunch?-No,Bob didn't eat his lunch.
3) Did you do your room in the morning?-Yes, I did my room in the morning.
4) Did Betty wash up after breakfast?-No,Betty didn't wash up after breakfast