В Passive: 1.What were you doing yesterday at this time? I was removing the calculus from the teeth.
2. A pathologist examines the tissues, using clinical and laboratory procedures.
3. In 1905, a German chemist discovered procaine, which he later called Novocain.
4. But this discovery definitely didn’t start the ear of dentistry, as some other dentists did t before.
5. This highly effective drill shortens the time of teeth preparation for the filling.

ответ:

2) -do you think they will finish the essay by tomorrow?

-yes, i'm sure they will finish.

3) i am sure: he will become a great scientist.

4) they are going to move to a new house.

5) -lucy will come to school tomorrow?

-i'm not sure about this, i'll call her.

6) -you have already done your homework?

-no, i'll do it now.

7) -i solve the problem in physics.

-i will help you.

8) i think john will come to school today.

9) he will be gone by the time we arrive.

10) -they will come in an hour.

-don't worry. i will finish cooking by then.

11) -here, take the pen.

-thank you, i'll give it in a minute.

1 One day mother wrote a letter to the teacher because she had learned that her mother was ill and she had to visit her, so in her letter she asked for the teacher's permission to allow her elder daughter to bring her little sister to school. 
2 Nancy was happy because she was willing(=eager) to go to school. 
3 She put into her father's old bag а pencil and a note book.
4 After breakfast the girls went to school.
5 Nancy sat at Jack's place, because he was absent that day.
6 When she opened her bag  she took out her pencil and a copy-book.
7 The teacher didn't call Nancy's name because Nansy wasn't a pupil.
8 The little girl got up and said: 'I want a present'  
9 I think Nancy drew the teacher because she liked her.
10 When the lessons were over the girls went home.