—Let's have a game of tennis; the loser has to treat the other to a hot dog．
— .
A. I'm afraid so
B. It's a deal
C. You've got a point
D. My treat
网友回答
A. I'm afraid so
(答案→)B. It's a deal
C. You've got a point
D. My treat
解析：考察交际用语。A恐怕是这样的。B成交；C你抓住了重点。D我请客。结合句意可知B正确。句意：我们来一场网球赛吧！输的人请对方吃热狗。—成交。