Ten dollars is not enough to buy the bag. Could you give me ________ dollars, mum？

Who can help me _____ my lesson? [ ]

Do you often play _________ soccer with your friends?—No, I don’t like sports. I often play ________ piano in my free time.

It’s ____ to teach a man fishing than to give him fish.

Are you going to take the job?－Certainly, though the salary is not so good．，you know．