---What’sinthatcave?---You’dbetter______inside．There______bearsorsnakes．A

---What’s in that cave?---You’d better ______ inside．There ______ bears or snakes．A.don’t go; may have beenB.don’t go; may beC.not go; might have beenD.not go; might be

D解析had better not do sth．劝某人别做某事；might be/may be对现在的情况进行猜测；may/might have been对过去的情况进行猜测。

和我的回答一样，看来我也对了