2. 外语
  3. Constituting one of the earliest engineering techniques, ______ in Paleolithic time was done in order to extend natural caves.

Constituting one of the earliest engineering techniques, ______ in Paleolithic time was done in order to extend natural caves.

admin2013-04-25  44
问题 Constituting one of the earliest engineering techniques, ______ in Paleolithic time was done in order to extend natural caves.
选项 A、tunnels were built
B、which built tunnels
C、the building of tunnels
D、tunnels whose building
答案C
解析
转载请注明原文地址:https://jikaoti.com/ti/AulYFFFM
0

托福（TOEFL）

相关试题推荐
随机试题
最新回复(0)