Упр.12 Unit 3 ГДЗ Enjoy English 10 класс

a) Choose three expressions from the two columns in Ex. 10 and write a sentence using each one.

b) Write a story about any discovery. Use the expressions from Ex. 10.

1. He must have forgotten his keys at home.

2. She may have missed the bus this morning.

3. They could have arrived earlier, but I didn’t see them.

I once read about the discovery of penicillin. Alexander Fleming must have noticed that mould killed bacteria in his laboratory. He may have been surprised at first, but he understood that this was an important discovery. Later, scientists could have developed the medicine that saved millions of lives. It was a great scientific breakthrough.