1. The
2.The
3.The
4.The
7.(According to your numbering) A
8.The
9.A
10.A
11.A
12.A
13. No article
14.A
15.The
16.No article
17.The
18. No article
19.a/an (it depends on different pronunciations around the world, I suggest you second check this with your school)
20.The
Answer:
the fleet of ships leaves
Explanation:
You would say the fleet leaves not the fleet leave.
The 'of ships' isn't relevant since we are not talking about the ships leaving, but rather the fleet.
Hope that helps :)