How is the moon similar to a dollar?

There is an English word that can be used up to four times in a row without modifying the spelling and form a valid grammatical sentence.

Do you know what word is that?

There are three houses in a straight row. One is red, one is blue, and one is white. The red house is left of the middle. The blue house is right of the middle. Where's the white house?

What kind of band never plays music?

What do you think with the below Picture ?

Which alphabet letter is a question?

Which city is three-fifths chick two third cat and 50% goat?

What can jump higher than a building?

They are the five precious gems of an everyday sort and all can be found on a Tennis Court. Who are they?

Take number 1000 and then add 20 to it.
Now add 1000 one more time.
Now add 30.
Now add 1000 one more time.
Now add 40.
Now add 1000 one more time.
Now add 10.

What is the total?