IV.
1. The word "mathematics" comes from Greek language.
2. By origin or etymologically, "mathematics" means "something that must be learnt or understood", perhaps "acquired knowledge" or "knowledge acquirable by learning" or "general knowledge".
3. Mathematics as a science, viewed as a whole, is a collection of branches.
4. The largest branch is that which builds on the ordinary whole numbers, fractions, and irritional numbers - simply, the real number system.
5. The whole numbers or integers.
6. Theorems.
V. c
My parents are angry because I (not to pass) do not passmy exam the other day.
2. At this time two weeks ago we (to lie) ___were lieingon the beach.
3. Beth (to become) ___becomespale when she heard the news.
4. I (not to be) am not impressed with his new car when I (to see) ___sawit yesterday.
5. The lesson already have began(to begin) and pupils were sitting at the tables.
6. They (to go) were going to the cinema when I (to meet) met them yesterday.
7. I (not to know) do not knowwhat time (to be) __is now. My watch (to stop) stopped in the morning.
8. My son (to watch) is watching television – his favourite programme (to be) is__ on now.
9. Now I (not to be) am not surr___ sure that he (to do) did his lessons at four o’clock yesterday.
Объяснение:
Не уверена насчёт 5 предложения