How _____ these students are listening to their teacher!A.careful B.careless c.carefully D.care我知道答案是C,为什么要选那个,我想不通,

How long have they built these highrises?(被动语态)How long _____ these highrises _____ _____ stud How much are these shoes?(改为同义句) ____ _____ _____ of these shoes? ( ) _____ are these apples? 2 kilos A.How yuan B.How C.How much 应该选择哪个?为什么? Excuse me ,how much are these postcards?They are for _____ if the cost of o 用is,are,It's,They're填空1.-How much _____ these green bags -_____ 20 yuan .2.-How much _____ these red shoes -_____ 50 yuan .3.-How much _____ those black trousers on that bed -_____ 100 yuan .4.-How much _____ this tape playre -_____ 120 yuan .5 How much did you spend on these clothes保持句子原意How much did you _____ _____these clothes These apples are delicious.How about the other apples?（改为同义句）These apples are delicious.How about ____ _____? These clothes are_____ _____ _____ how much are these how much are these These books are _____. —What are you doing there?—I am doing the _____.How dirty these clothes─What are you doing there?─I am doing the _____.How dirty these clothes are![ ]A.dishesB.reading C.laundry D.sports how are you these days? How are u these days? How many apples are these How much are these pants How are you these days?