As the old saying goes， "Quit while you're ahead." If you already have everything you need，you shouldn't become too greedy （贪婪的）.
    A lion （1）

woke

woke

（wake） up one evening and felt hungry.He went to look （2）

for

for

food in the forest.He wanted （3）

to catch

to catch

（catch） something to eat and he did it （4）

easily

easily

（easy）.Then，he saw a rabbit running about.Soon，he caught the little rabbit. （5）

As/When

As/When

he was going to kill it，he saw a deer.He thought he would eat the deer because it was （6）

bigger

bigger

（big） than that rabbit.So he left the rabbit under a tree and ran to the deer， （7）

but

but

the deer ran fast and escaped （逃脱）.Tired and hungry，the lion （8）

stopped

stopped

（stop） running and said to himself， "Why not go （9）

back

back

to eat the rabbit？" But after he got to the tree，the rabbit was gone.Now the lion had no rabbit （10）

or

or

deer to eat.