1. Must
2. Couldn't
3. Must
4. Should
5. Should
6. Ought
7. May
8. Mustn't
9. Should/need to
10. Should have
Everyone has heard of Bill Gates. He is one of the richest and most successful people in the world. He was born in America in 1955. He was the youngest and the most famous businessman at the age of 31.
He has got a gray wild hair. Also, he has got grey eyes. He is very slim and well built.
One reason for his success is that Gates has always been very ambitious and hardworking. For such a rich person, his life is simple, and he spends little on himself and his family. He often gives his money for different charity.
At school Bill liked Maths and Science. After finishing school, Bill wrote program for the Altair. He invented the Microsoft company. If he has got free time he likes puzzles, golf and reading about science.
I admire this person.
1 must
2 was able
3 have to
4 must
5 should
6 have
7 might
8 mustn't
9 need to
10 had to