— Have you played DotA before? We need one more team member.— . But I like online games, s

— Have you played DotA before? We need one more team member.
— . But I like online games, so I believe it will be fun to learn DotA.
A. You must be crazy B. Not really C. Never mind D. That’s cool

解析：A. You must be crazy 你肯定疯了 B. Not really不完全是，事实上不是C. Never mind没有关系 D. That’s cool那样太酷了。句意：你以前玩过多塔吗？我们还需要一位队员。实际上我没有玩过。但是，我喜欢网络游戏，所以我相信我学习多塔是很有趣的。根据句意来看，故选B.

就是这个解释