Ⅱ.补全信息
选择正确选项填入空白处，补全所给句子提供的信息：
A．what caused the Maya to abandon most of their great cities
B．Why Maya civilisation collapsed
C．how powerful the secrets of Ancient Maya civilisation are among people
D．What is most extraordinary about these complex
structures
E．that the locations of the 117 known Maya cities correspond to the positions of the stars
1．Through comparison，he found ________．
2．Although his theory has been dismissed by scholars，it shows ________．
3．________ is how they were built without the use of wheels，metal tools or even animal power.
4．But the greatest mystery of all is ________．
5．________ remains a mystery.
[答案] 1－5 ECDAB
