1. Замените модальный глагол эквивалентом. 1. He (must) work hard on your English.
2. You (must) learn the words tomorrow.
3. You (must) not talk at the lesson yesterday.
4. I (cannot) dance last year.
5. She (can) speak French.
6. (Can) you help me in the garden tomorrow?
7. She (may not) come home late last night.
8. They (may) have a disco party at school tomorrow.
9. He (may not) invite his friends to his place yesterday.

A) were books first printed in the 15th century?   he asked if books had been first printed in the 15th century. b) did printers start printing books in three countries at the same time? he asked if printers had started printing books in three countries at the same time. c) can anyone read books on cds these days? he wanted to know if anyone could read books on cds those days. d) did columbus discover america five centuries ago? he wondered if columbus had discovered america five centuries before. e) does the internet provide us with access to any library all over the world? he asked if the internet provided us with access to any library all over the world. f) didn't people living in one part of the world know much about the life of people in their neighbouring countries not long ago? he wondered if people living in one part of the world hadn't known much about the life of people in their neighbouring countries not long before.