38. Please refrain______while onboard this aircraft. It is now prohibited.
(A) from smoking
(B) to smoke
(C) smoking
(D) smoked

答案：登入後查看
統計： A(136), B(71), C(122), D(5), E(0) #637930

詳解 (共 3 筆)

#1043061
refrain from doing sth
21
0
#1459914
aircraft n.飛機 prohibit V.禁止
6
0
#908991
refain克制
5
0