Розкрийте дужки, поставивши дієслово у правильну часову форму чи утворивши правильну граматичну конструкцію.
Some people (not/ to like) visiting theatre.
Look, what (to do) they?
She (not/to be) to London yet.
If I (to have) extra money I (to buy) a small present for him.
They (to see) this picture in the Louvre last year
Who (to speak) when the teacher came in?
Where (to go) you first of all after the quarantine?
He (to hear) this news before our meeting.
What (to do) you at this time tomorrow?
If we meet she (to be) happy.
My classmates (not/to know) about my hobby then
What (to do) she for all this time?

1. No wonder he is very tired. He has been working hard for the last three months.
2. My mother (is coming) to stay with us next weekend.
3. Do you often ( get) letters from her? - Not very often.
4. If we (do not get) to the station before seven we (shall miss) the train.
5. Mary (is) in the kitchen now. She (is putting) the supper on a tray to take it to the dining-room.
6. Do you (hear) anything? - Yes,I (can hear) soft music.
7. I (have not seen) him since we finished school
8. Is everybody here? - No, Mr.Black (has not come) yet.
9. I (lived) in London many years ago.

 Nowadays there are about six thousand languages around the world. But many languages are endangered. And even greater number s are extinct. At all times,   language was not only a means of communication, but also part of cultural heritage. Languages vanish when their last speaker dies. With them dwindles the world’s culture and a piece of history disappears. For example, in the works of the well-known British linguist David Crystal, the formerly unknown to the world Kasabe language was recovered. Its last native speaker died in 1996, leaving absolutely no information about the language and its history. So, what will happen to the world if languages continue to disappear? Rare languages will disappear first. As a result, many centuries later the "giant" languages’ turn will comes. This means that some day people will lose their ability to communicate with each other, world culture will be devastated, a general degradation will start. Humanity will return to the primitive age. Do we want such an outcome?
Прежде, чем работать над грамматикой, надо бы поработать над стилистикой.
А то, коряво местами, не говоря уже о том, что - спорно. Но это уже вопрос к автору.