1. i'm m. i (call) the doctor.

2. tim has broken his leg and stays at (visit)

home. -sorry to hear that l

him tomorrow. 3. it's julia's birthday today. she’s bought

much food. she (cook) a lot. 4. -my bags are terribly heavy today. -

really? i (give) you a lift.

5. -do you know kate’s phone number? -i’ve bad memory for phone numbers, but i (look) for it in my notebook.

6. my uncle has bought bricks. he

(build) a house in the country. 7. -has he decided how to spend the

money? -yes, he (buy) a car. 8. -haven’t you taken my key? i can’t find it.

-just a minute. i (look) for it. 9. -jack didn't pass his exam yesterday.

oh, what he (do)? 10. -there is somebody at the door.

open.

1. My sister was cleaning her room.

2. Did my sister clean her room?

3. My sister didn't clean her room.

1. We lived in London last summer.

2. We lived in London last summer?

3. We didn't live in London last summer.

1. Sandra and Elsa talked on the phone in the evening.

2. Did Sandra and Elsa talk on the phone this evening?

3. Sandra and Elsa didn't speak on the phone that evening.

1. You were studying for the test two days ago.

2. Did you prepare for the test two days ago?

3. You didn't prepare for the test two days ago.

1. My parents were watching TV last week.

2. Did my parents watch TV last week?

3. My parents didn't watch TV last week.

Думаю, тут принципеп понятен.

Pluses online lessons:
Online lessons is the perfect solution for all adults who want to learn. In general, for all those who study other than a lot of other serious responsibilities . Ability to create a flexible and convenient schedule classes.Save . Even if paid online lessons , they are still cheaper. It also saves time and effort , which is usually spent on the road to reach the conventional learning .Learning is fun and allows you to apply rich media material , whereby the absorption of the material is better.Exception of personal contact with the teacher and other students , in some cases, help get rid of psychological discomfort .Cons online lessons:
- The lack of influence of the teacher on the student , thereby losing control and efficiency of employment often .
- Mental discomfort and learning material deterioration due to lack of physical interaction . Facial expressions and gestures of the teacher , as well as his voice , too, involve memorizing material.
- The need for high-quality Internet connection to employment is not interrupted and the maximum benefit and efficiency.
Note: If you are interested in the starry sky from the point of view of science, the presentation will be useful for astronomy. Such presentations can be very useful and informative