Do you want to do something this Sunday? John and I would like you to come over for a party.
你星期日要不要做什么事?约翰和我想请你过来参加宴会。
You're excused.
不要紧。
And why only snakes? Cats, for instance, would be greatly helped; no running fights with large, fierce rats or tussles with grown rabbits -- just a bite and no more effort needed.