阿摩線上測驗
172. In ancient times, people used large shells to ______ voices in open-air ceremonies so that their tribalmembers near and far could hear what was said.
(A) amplify
(B) mobilize
(C) penetrate
(D) undermine
答案：登入後查看
統計： A(47), B(8), C(9), D(3), E(0) #1592382
統計： A(47), B(8), C(9), D(3), E(0) #1592382
