53. Поставьте глаголы в скобках в простое время или в настоящее совершенное время. .
A: So, Ms Peters, tell me a bit about your studies, please.
B: Well, I ... (just/finish) university, where I studied archaeology.
A: ... (you/do) any work in the field?
B: Yes, I ... (work) as a field assistant on several occasions. I ...
(spend) last summer in Turkey.
A: What ... (you/learn) from this experience?
B: Well, it ... (teach) me how to decide what was important and what
wasn't.
A: I see. What area of archaeology are you most interested in?
B: Egyptology
A:... (you/ever/be) to Egypt?
...
B: Yes, I ... (be) there twice.
A: Thank you very much, Ms Peters. I'll get back to you soon.
2. is Ann writing a letter?
yes, she is/no, she isn't.
3. is david having breakfast?
yes, he is/no, he isn't.
4. is mr Green asking Amy about her studies?
yes, he is/no, he isn't.
5. is mrs Green watching TV?
yes, she is/no, she isn't.
6. are the children reading a new book?
yes, they are/no, they aren't.
7. is Peter showing his picture?
yes, he is/no, he isn't.
8. are the students writing a test?
yes, they are/no, they aren't.
9. are we having tea now?
yes, we are/no, we aren't.
10. are you having coffee now?
yes, you are/no, you aren't.
1)Building materials are divided into natural (natural) and artificial(Строительные материалы разделяют на природные (естественные) и искусственные)
2)Не смогу сказать.
3)metals are divided into two groups: ferrous and non-ferrous(металлы делятся на две группы: черные и цветные)
4)Ferrous metals are those that contain steel and iron.Non-ferrous metals do not contain steel or iron. This group of metals includes: aluminum and copper, Nickel and lead, zinc and tin, brass and gold, silver and platinum, as well as many others that do not contain iron.(Чёрными называются те металлы, которые содержат сталь и железо.Цветные металлы не содержат стали и железа. К данной группе металлов относятся: алюминий и медь, никель и свинец, цинк и олово, латунь и золото, серебро и платина, а так же многие другие, не содержащие железо.)