问题补充：
— Lets have a game of tennis; the loser has to treat the other to a hot dog.
— .
A. Im afraid so
B. Its a deal
C. Youve got a point
D. My treat
答案：
A. Im afraid so
(答案→)B. Its a deal
C. Youve got a point
D. My treat
解析：A.我认为是这样 B.成交 C.你说的有道理 D.我请客。句意：—让我们进行一个网球比赛,输了的一方必须请赢方吃一个热狗。—成交。故选B
