29. Why are many of the cliff dwellings only accessible by rope-ladder?
(A) To limit the number of tourists and lower the possibility of being damaged.
(B) To make it harder to be intruded by possible enemies.
(C) To save on the cost of building or carving stone ladders.
(D) To show their great skill of basket weaving in another form.

答案:登入後查看
統計: 尚無統計資料