問題詳情
147. As a young man, Alexander Graham Bell had dedicated his life to help deaf people, trying to make extra money by working out how to improve the telegraph.
(A)to help
(B)make extra money
(C)working out
(D)to improve
參考答案
答案：C
難度：困難0.333333
統計：A(3),B(2),C(4),D(1),E(0)