Answer:
Replace a with the
because it's more specific
B- you choose your topic on based purpose. If you purpose is to educate your topic would be different then if you
want to entertain your audience.
Answer:
Section 1
A. We discussed about the problem so thoroughly
Section 2
C. got drowned in the Pacific Ocean.
Section 3
A. I could not put up in a hotel
Section 4
C. is free now from the narrow vested interests.
Explanation: