1. A: Let's put a bell on the cat.

Question

Do you agree?

B:Yes, I do. I'll second that.
(What other expressions can we use instead of 'second'?)

2. It is a piece of cloth or other material.

3. It is a piece of cloth or other materials.

(Are both sentences correct and grammatical? Or which one is right?)

Answer 1

B. I'll vote for that. / I concur. /

Instead of material, you could use "substance."

Sra