a. “such”, “so”
1. The day was so exciting!
2. It’s such an original idea!
3. The letter is so informative!
4. It’s such good weather today!
5. The dress is so smart.
6. I can’t afford such an expensive coat.
7. His health is so poor.
8. You can’t talk in such a way.
9. Her taste is so good.
10. Helen has such a good sense of humour.
b. «must», «to have to», «to be to»
1. I missed my bus, and I have to get there on foot.
2. You must always revise grammar rules.
3. Mr. Smith has to speak with his students at 10 a.m.
4. I had learn all the words yesterday not to get bad marks.
5. You must do well at school.
6. Concerning the timetable the train must arrive at 9.45 a.m.