Question:
Multi-choice problem: Continue writing the next sentence for the following:

How to be familiar with various types of mechanisms of organic reactions
Organic reactions can usually proceed in one of two ways.
One of them is concerted reaction that takes place in one step with one transition state. The other type of reactions in organic chemistry is the non-concerted type of reactions.
****
Answer:
The latter type is the dominant type of most chemical reactions. Non-concerted organic reactions usually have intermediate structures that are highly reactive carbon species.

Question:
Multi-choice problem: Continue writing the next sentence for the following:

A man picks up a ball with his racquet and swings it to his opponent over the net. The opponent serves the ball. the teams
****
Answer:
engage in rapid back and forth hitting of the ball.

Question:
Multi-choice problem: Continue writing the next sentence for the following:

The video shows a tutorial from howcast on how to create volume in a haircut. a lady hair dresser wearing a green shirt and pants
****
Answer:
is demonstrating a haircut on a model wearing a black tank top.

Question:
Multi-choice problem: Continue writing the next sentence for the following:

A man with a beard is playing on a green drum. the man
****
Answer:
starts adding in a second drum to the mix.