this kind of watch____（sell）well

this kind of watch____（sell）well Apples of this kind sell well. this kind of football_____(sell)well, This kind of machine ___ well.(sell) Our classroom___ every The books of this kind sell well.那么This kind of books sells This kind of shoes __________ (sell) well.用sell还是sells? cellphones of this kind [ ]well [a] sell [b]sells [c] are so 麻烦讲清楚语法,Books of this kind ______________ (sell) well. books of this kind ----well A sell B sells C were sold D is this kind of ipad Tom is fond of___(sell) well now This kind of shoes ____(sell) well.一句子,sell 不是系动词,也不知道动作的执行者 books of this kind_____very well.(sell/sells)