根据汉语意思完成句子
从方框中选词并用其适当形式填空
wear sing hear watch help
（1）Tony likes music and he likes ____.
（2）Be quiet! Can you ____ someone is singing a song?
（3）Tom’s aunt always ____ T- shirts.
（4）The family like ____ TV at home together.
（5）Li Lei always ____ others.
室温下，取浓度相同的NaOH和HCl溶液，以3∶2 体积比相混合，所得溶液的pH 等于12，则原溶液的浓度为
