A lion is tired very much and sleeps on the ground one day . A cat runs after a little mouse . The  mouse runs around and comes to the lion . The mouse sees the lion and he is very afraid   . " I' m very sorry . Please let me go . I can help you some day . " The lion sleeps well and feels happy now . He says , "You can help me ? You are too small . But I am happy now . You can go . " The mouse goes . One day , the lion is in a cage  . He can't get out . The little mouse sees the sad lion . He bites    the cage with his teeth . Soon the lion goes out . "Am I right ? " says the mouse , " A small animal can help a big one sometimes . " Why does the lion sleep on the ground one day ?
Because he is very hungry . Because he likes sleeping . Because he is very tired . Because he isn't busy .