how many children is there in the sandbox.改错

how many children is there in the sandbox.改错 How many children dose the mother have?How many children dose the mother has?which is right and why? how many children does cage have How many children has your mother got? how many children are having the field How many children has your mother got? How many balls do the children play? 翻译:How many children does he have? how many is How many children in our school?还是how many children our school? How many pens is there? many,do,have,children,tent,the,how(?) 怎么连成句子 How many children are there in your class? are,many,children,how,there连词成句 children,many,there,your,class,in,how,are连成一句话 many,do,have,children,tent,the,how(?) 怎么连成句子 How many days do children have for weekend holiday?中文? how many children are having the field trip 怎么回答