题目内容:
WhatmadeiteasiertobuildtunnelsinLondonthaninDublin? A.TherewerenotsomanybuildingsinLondonasinDublin.
B.TheclayofLondoniseasiertobedugandwaterproof.
C.LondonhadmoreadvancedmachineandtechnologythanDublin.
D.London'sclayissturdierandharder.
参考答案:
答案解析: