Writing. Task 2 . Topic: Our class. Think about your school. Give some information about the subject and classmates. Write about it. These questions will help you.  What is your favourite subject? Why? Do you like your classmates? Are you friendly with your classmates? Which subject are you good at? What sport activities do you like most at your school? Why?  How many lessons have you got every day? What does a person do to be good at school?  Do you enjoy spending time with your classmates? Why? 

1)I didn't know that Joe had to get up early, so didn't wake him up. If I knew he had to get up early, I'd wake him up.
2) I was able to buy the car only because Jane lent me the money. If Jane didn't lend me the money, I wouldn't be able to buy the car.
3) Karen wasn't injured in the crash because she was wearing a seat belt. If Karen didn't wear a seat belt, she would be injured in the crash.
6) You didn't have any breakfast that's why you're hungry now. If you had some breakfast, you wouldn't be hungry.
7)I didn't get a taxi because I didn't have any money. If had some money, I would get a taxi.

I have just been  to the post office. I've got some stamps.

Your computer will work perfectly if you call out a technician to repair it. 

The modern operational system controls and manages the use of the hardware.
The use of the hardware by the modern operational system.(Вот здесь не поняла что нужно дополнить)

We have to apply for a visa. We can't just travel on our passports.

will be helped 

My parents will go to the South next year.

Have they been in touch yet? – No, they haven't. I had had any news. (если честно не поняла смысла этого предложения)

I often drive to work but I take the train this morning because my car is in for repair. 

will Peter ride his bicycle this afternoon? Can I borrow it? 

We were not able to get a hotel room because we did not book in advance.