Could you turn ______ the music, TonyGrandpa is sleeping.– Sorry, dad. I will do it right away.

下列加点实词解释错误的一项是：（ ）

At themeeting they discussed three different ______ to the study ofmathematics.

did you save the drowning girl,_________parents were both professors —It was from the lake __________ she often wentfishing.

If you want better public services, you’ll have to pay ______ tax. [ ]