阿摩線上測驗
20. When _____ about how he became rich overnight, Richard showed uneasiness and shunned the topic.
(A) ask
(B) asked
(C) asking
(D) be asked
答案：登入後查看
統計： A(12), B(168), C(99), D(49), E(0) #3229004
統計： A(12), B(168), C(99), D(49), E(0) #3229004
