Solution:

Bette

Solution:

As Fur as possible. (Fur => Far)

Solution:

The answer is a mosquito. You can also answer with any other blood sucking insect.

Solution:

No layer will go on 'the fifth layer' because the fifth layer is the last layer.

Solution:

A quill cannot write even a single word. However the person holding the quill can use it to write as many words possible with the given amount of ink.

Solution:

A pen cannot write even a single world. It's the person holding the pen who can write the words.

Solution:

The cheerleaders.

Solution:

It is because there is not a single (unmarried) person it.

Solution:

Both of them were able to cross the river because they were standing on the opposite sides of the river.

Solution:

Yes. You can do it by selling them.