問題詳情

【題組】31. The passage says that maintaining good posture _____.
(A) takes a lot of practice
(B) is not difficult to do
(C) can be very tiring
(D) causes back problems

參考答案

答案：B
難度：非常簡單0.916667
統計：A(0),B(11),C(0),D(1),E(0)