16. Children are not allowed to use the swimming pool____ they are with an adult.
(A) in case
(B) provided
(C) unless
(D) as long as

答案：登入後查看
統計： A(12), B(15), C(190), D(14), E(0) #788568

詳解 (共 2 筆)

#2810113
A避免 B證明 C除非 D只要
0
1
#1195325
小孩不被允許使用游泳池,除非有大人隨同
0
0