We excitedly
This phrase needs a verb to complete it. A suitable completion could be "donated" or "took part in," depending on the context.

donated
This is the correct word for giving something, usually money or items, to a cause or charity.

activity
This term refers to a specific action or event. It fits the context of describing an event or action related to helping others.

cleaning
This is the correct form of the verb "to clean" used as a noun, referring to the act of making something clean.

helps poor people
This phrase describes the purpose of an action, specifically assisting those in need.

Volunteer
A volunteer is someone who performs work willingly and without pay.

The government in 2006.
This phrase is incomplete. It likely needs more context, such as "The government in 2006 introduced a new policy" or "The government in 2006 funded a program."

A. homesick
Homesick means missing one's home. It does not fit the context here, as it seems to be a misfit. Instead, words like B. voluntarily (done willingly), C. sociable (friendly and outgoing), or D. house (a building) could fit other contexts.

What should we call a person who meets in the streets without being paid?
Volunteer is the correct answer here. A person who helps out in the streets without payment is a volunteer.

I have 5 thousand dong every day to help street people.
This sentence is correct. It indicates a daily amount of money used for aiding people in need.