It’s very kind ______ you to show me the way.
Simon is ______ to make us all ______.
---Can you work out the maths problem? ---Sorry, I can ______ understand its meaning.
--- Are you worried when your son often plays computer games? --- Yes. I think playing too many computer games ______ on teenagers.
I won’t watch TV ______ I finish my homework.
---______ to give the letter to Mr. Wang. It’s very important. ---No, I won’t.