题目：Mr Smith's physical therapist recommended that he _____ the treatment until the swelling has gone down. (A)continue (B)continued (C)has continued (D)is continuing 答案是(A) 疑问：1.不用加s吗 he continues 2.时态是以that+子句后的 has 来决定是现在式 不是以recommended的过去式对吧? 谢谢~!