阿摩線上測驗
5. The scientists experiment successfully with the drug in the laboratory; now they need to
test it on human _____ .
(A) neighbors
(B) volunteers
(C) resources
(D) survivors
答案：登入後查看
統計： A(8), B(748), C(63), D(79), E(0) #822390
統計： A(8), B(748), C(63), D(79), E(0) #822390
