ГДЗ Англійська мова 11 клас Карпюк 2019

4. Correct the mistakes printed in bold. Explain your corrections.

1. We have been waiting here until he plugged in the laptop.
2. I forbid you to use the computer till you will be sixteen.
3. When Sophia comes back next month, it is three years since she had been away.
4. Scientists found it difficult to cure many illnesses until the level of technology was improved.
5. She never uses her mobile when the battery is low.
6. Last week, Sam required a refund when he discovered that his new digital camera is broken.
7. Until you bought me a cellular, I have been using a land–line phone.
8. Tomorrow Tom will pay the connection fee when he goes to work.