31. "You can't have this football back you promise not to kick it at my cat again," t

問題詳情

31. "You can't have this football back you promise not to kick it at my cat again," theold man said firmly.
(A) because
(B) since
(C) when
(D) until

答案：D
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)