31. The five-year-old child was tired after a long walk with his father in the mountains and asked his father for a __________. But his father was exhausted, too.
(A) piggyback
(B) hunchback
(C) feedback
(D) horseback
詳解 (共 1 筆)
未解鎖
(A) piggyback (v.)背...
阿摩線上測驗
登入
