How much did your bike _______—- I ________400 yuan for it.

（题文）______ expense, we must take every measure to save the old man’s life.

He is good__________playing basketball ,so he is good_________children. Playing basketball is good________his health.

I’ll make some dumplingsfor dinner.–Great! Let me help you _______the meat.

You’ve _______ such a good idea, thank you. We’ll try it at once.