do some practice还是do some practices单数还是复数?

do some practice还是do some practices单数还是复数? practice to do 还是doing? do some review 还是do some reviewing let's do some practice这样说对吗 practice doing(do) something? practice 加doing 还是 to do 还是什么 practice加to do还是doing…… practice用法后面加to. do. 还是doing make some reading还是do some reading do some trouble还是make some trouble do some exercises还是do some exercise对 是do some cleaning还是do some cleanings啊~为什么 do some baby-sitting 还是do some baby-sittings? do practice in drawing pictures do some do some + They_____（practice） English every moring,but this moeing they______（do） some reading. Please(t )out your exercise-books and do some written practice.怎么填