阿摩線上測驗
8. Recent research shows that it is possible__________ a voice-controlled
coffee machine, but the price is currently prohibitive.
(A) developing
(B) to develop
(C) development
(D) which develops
答案：登入後查看
統計： A(15), B(81), C(2), D(0), E(0) #3105196
統計： A(15), B(81), C(2), D(0), E(0) #3105196
