In the past，a man in the State of Qi thought too much all day long.He was afraid that the sky might fall，that the land might cave in a（1）

nd

nd

that he would have no place to live.He was so （2）w

orried

orried

that he could neither eat nor sleep.His friend who cared about him came to educate him by（3）s

aying

aying

："The sky is only an air mass（團(tuán)）.All men's a（4）

ctivities

ctivities

are inside this mass.（5）W

hy

hy

do you worry that the sky would fall？"
   The man of Qi asked： "If the sky is really an air mass，then wouldn't the sun，the moon and the stars（6）f

all

all

down？"
   His friend said： "The sun，the moon and the stars are only things that can shine in this mass.（7）E

ven

ven

if they fall down，they would not harm people."
   The man of Qi asked again： "Then what can I do when the（8）l

and

and

sinks？ "
   The man said： "The land is only piled-up earth.There is earth jye.aiwhere.Every day you walk on the land.Why do you worry that it would sink？" When the man of Qi（9）h

eard

eard

this，his worries went away at once and he became very glad.His friend who talked with him and cured his melancholia（抑郁） was very（10）p

leased

leased

too.