grammar question

Q. Exercise 10. Fill in the blanks with suitable noun phrases :

     1.  .............. is your own responsibility.

     2. Would you like ................ ?

     3. ............. has become our national hobby.

     4. Man is ................. .

     5. The best course is ................

     6. ............. is noble.

     7. ................ is miserable.

     8. All of them were interested in ................

     9. ............... in eighty days was thought to be impossible.

    10. ............... is easy but keeping one is difficult.