题目内容:
WhyistheaveragecostofchildcareinMississippimuchlowerthaninMassachusetts?
A.Theoverallqualityofserviceisnotasgood. B.Paymentsforcaregiverstherearenotashigh.
C.Livingexpensestherearecomparativelylow.
D.Eachteacherisallowedtocareformorekids.
参考答案:
答案解析: