We all face quantity of stresses ,whether at work ,in the home ,or anywhere in between. 答案：quantity →quantities quantity of 和quantities of 不都可以接复数可数名词和不可数名词啊！为什么要这样改？
quantity →quantities 如果不加定冠词the，不定冠词a/an，也就是零冠词, 即不加冠词的时候， 名词需要复数，结尾-s.这样才表示泛指。 如have a meeting with sb. 同 have meetings with sb. 但不能 have meeting with sb.