His business failure left him at the edge of desperation, but, , he managed to go out of the shadow through years of efforts.

Would you mind basketball here? —Sorry. We’ll go and play it on the playground.

I ______ much progress in my English study since last term.

Hello, this is Jack. May I speak to Tom?– Sorry, he isn’t in at the moment. If he _______ back, I’ll ask him to call you back.

Mrs Zhang has taught ______math for three years and she teaches very well.