烤烟基本色由浅至深，烟叶化学成份变化规律是（）。A、总氮含量增加 B、烟碱含量减少

When I was a little girl, mum and dad told me that if you plant something in spring, you’ll get more in autumn. I    1   this without doubt.
At the age of six, while I was eating a big apple, I dropped a tooth.
I was so    2   that I cried all of a sudden and rushed to my grandma’s room. She held the tooth and smiled, “Don’t worry, dear. It’s a baby tooth. You will have a new tooth in a few    3  .”
“A new tooth?” I fell very surprised.
“Yes, you will have that tooth    4   you get old, so you must protect your new tooth well. When you grow old, the teeth will fall out again,   5   this time, it won’t grow again. So it’s not easy for old people to eat anything,” grandma said.
I went out of grandma’s room and thought, “   6   should I put the dropped tooth?”
Suddenly, a wonderful thought came into my mind: Why not plant it in the ground? If I took good care of it, day after day, maybe it would become a big tree. When    7   came, there would be many white and strong    8   on the tree. I could pick them and send them to the    9   people who needed them. So then they could eat well and always open their mouths with a smile full of beautiful teeth.
Of course my tooth didn’t grow into a big tree, but beautiful thoughts made my childhood warm and unforgettable. With them, I    10   up.

小题1:	A．believed B．received C．kept D．remembered

小题2:	A．angry B．hurt C．frightened D．sorry

小题3:	A．hours B．days C．months D．years

小题4:	A．if B．after C．before D．until

小题5:	A．but B．and C．or D．instead

小题6:	A．How B．Why C．When D．Where

小题7:	A．spring B．summer C．autumn D．winter

小题8:	A．flowers B．teeth C．leaves D．fruit

小题9:	A．old B．young C．sick D．middle-aged

小题10:

A．came B．went C．grew D．turned