If H2 burn in O2, we can get _____.

It’s kind _______ you to help me with my Math. Now I think it’s easy _______ me to learn Math well.

With the project of animal protection, foxes are becoming more ________ in urban areas.

_____ is a possibility _____ Tom will get first place in the long jump.

The soft music sounds ________. We are alllistening _________.