A man got lost in a desert（沙漠）.He walked for two days，（1）

but

but

he still couldn't find his way out.Dying for water，he found an（2）

empty

empty

/empti/ house in the desert.There was a water pump（水泵） in the house.
   The man was so excited that he ran to draw water.But no matter how hard he（3）

tried

tried

（ try），no water came out.
   He was sitting（4）

sadly

sadly

（ sad） on the ground when he saw a little bottle with a cork（木塞） in it.On the bottle，an old note said，"You must add the water into the pump（5）

before

before

you can draw water!Don't forget to fill the bottle with water again before you leave!"Then man took the cork out and found the bottle was full（6）

of

of

water!
   "If I am selfish（自私的），I can go out of this room after I drink the water，"he thought."If I do as the note says，I might die of thirst（渴）.Should I take the（7）

risk

risk

/r?sk/ or not？"
   At last，he decided to do as the（8）

note

note

said and began to draw water.Sure，lots of water started（9）

coming

coming

（come） out from the pump!
   After he（10）

drank

drank

（ drink） enough，he filled the bottle with water and added his words after the note."Believe me，do as the note tells you!"he wrote.