3. To make their homestay a pleasant experience, students have to follow certain rules of ____________.
(A) extinction
(B) etiquette
(C) import
(D) income

答案：登入後查看
統計： A(60), B(105), C(20), D(13), E(0) #805044

詳解 (共 1 筆)

#1044380
extinction消滅
etiquette禮儀
3
0