What’s the________ of this word “sorrow” —It _______ “sadness”.

what’s wrong with Simon — He is feeling becausehe didn’t pass the exam.

What do you think of math—- I think it’s useful, so it’s ______ for us to learn it well.

You can’t be too careful; this kind of cloth_____

I wonder _____ you’ll water this kind of flower.— Every other day.