-Can you tell me why you learn English so well?-It’s very simple._____ you work,______ grades you will get.
It _________ us about two hours _______ that picture last night.
There are so many kinds of radios in the shop. I can’t decide _________.
Father is ill. He wants his doctor to give him _____ about his heart trouble.
____ his way to school, he picked up a wallet and found the owner ____ a rainy day.
Would you mind my ______ the window?