题目

连词成句。【1】is our home this ___________________________________________________.【2】this at look elephant___________________________________________________.【3】she a wears sweater red___________________________________________________.【4】is whose this___________________________________________________?【5】is your scarf this ___________________________________________________?已知a,b为实数，，则代数式的值为（ ）A、2 B、3 C、 D、 3或