6. The explorer was Christopher Columbus and he discovered America.
The explorer .................................................................................................................................................................................
7. In spite of his good learning condition, he doesn't study well.
Although ......................................................................................................................................................................................... .
8. He didn’t marry until he was 40 years old.
Not ...................................................................................................................................................................................................... .
9. Mary doesn't speak English so well as Jane.
Jane .................................................................................................................................................................................................. .
10. She hardly did this exercise.
Hardly………….. ....................................................................................................................................................................