75. One reason that rural houses cost more to heat is that ________ .
(A) they are not as well built as modern city houses
(B) they can’t be reached easily
(C) the people who live there are older
(D) more people live there
答案:登入後查看
統計: A(31), B(48), C(10), D(2), E(0) #3271967
統計: A(31), B(48), C(10), D(2), E(0) #3271967