Answer:
1. Topic.
2. Main idea.
3. All three? I don't understand what you were trying to say in the question. If you meant what to do to look for the main idea of a text, all of the above should be correct.
Explanation:
Answer:
The first one is When a machine is used for spare parts for another machine.
Explanation:
Answer:
A shortfin mako is a kind of shark that can leap 20 feet out of the water.
Explanation:
Answer:
B
Explanation:
The correct answer is was, singular noun always carry singular very and in the past