叫狼看守羊
引狼入室

keep the wolf from the door keep to the record keep to the bottle keep to the right keep to the point to set the table set the axe to set the tortoise to catch the hare the sheep and the goats the cry of wolf the big bad wolf keep the wolf from the door keep to the right keep to the point keep to the bottle keep to the record to keep the ball rolling set the axe to to keep one's eye on the ball the big bad wolf the sheep and the goats set one's shoulder to the wheel keep the rules