阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。
One day, a mother horse told her son,
"My child, will you {#blank#}1{#/blank#}(happy)
go and carry this bag of wheat to the mill(磨坊) to make it
{#blank#}2{#/blank#} flour?" The little horse agreed without hesitation
and {#blank#}3{#/blank#}(run) out of the house with
the bag of wheat on his back.
After some time, the little horse came to a
river, {#blank#}4{#/blank#}blocked his path to the mill. He
suddenly got {#blank#}5{#/blank#}(confuse).
Looking around, he saw a cow. So he asked, "Auntie Cow, can you tell me whether
I can cross the river?" The cow answered, "Definitely you can. The water
is very shallow." When the little horse was about {#blank#}6{#/blank#}(cross) the river, a squirrel shouted
to him, "Don't cross the river. You will drown." Not {#blank#}7{#/blank#}(know) what to do, the little horse
decided to go back to ask his mother,
who said, "My son, it's not enough to only listen to others; you have to give
it {#blank#}8{#/blank#} try by yourself, and then you'll know the answer."
With those words, he walked carefully across
the river. The water was neither shallow nor {#blank#}9{#/blank#}(deeply).
It was just fine for him. Finally the little horse crossed the river and completed
his task. He also learned to overcome {#blank#}10{#/blank#}(difficulty)
by practicing instead of only listening to others.
