long ago people made fires from lightning(闪电)。 But they had to keep the fire burning, for they couldn’t start it again if there was no lightning. Later, they found out hitting two piece of stone together could make a spark (火花). The spark could fire dry leaves. In this way they could make the fire again if it went out. Then people also learned to make a fire by rubbing. They made a hole on a big piece of wood and put a smaller stick into the hole. They turned the stick again and again. After a few minutes they got a fire.
As years went by, people learned other ways to make a fire. Sometimes they used the heat from sun. they held a piece of glass in the right way and made a piece of paper on fire.
About two centuries ago, people began to make matches (火柴). Matches brought people a quick and easy way to make fire. Today matches are still being used, but people have more new ways to make fires. One of them is to use an electric fire starter. Of course an electric fire starter is much more expensive than a box of matches. But it is more useful.
【小题1】 A spark can _________.

What should we do to keep healthy? One important rule is to exercise__31__. The Fang family try to exercise every day. Mr Fang__32__exercise in the morning because he must get to work at exactly seven o'clock. But he runs every evening. He walks a lot, __33__. He walks to school every day, and after school he__34__different sports with his friends. Mr Fang goes to a yoga （瑜加功） class__35__.
But it wasn't__36__this way. Last year Mr and Mrs Fang used to(过去常常)__37__everywhere in their car, even to the drugstore（药店） two blocks（街区）away. They thought they had to use the car all the time. They wouldn't walk.
The Fangs all__38__better（更好的） now. They believe they shouldn't be lazy. We__39__exercise every day, but we should try our__40__to exercise as often as possible.

When Bill and Kate married(结婚), neither of them had much money, so they were not able to __44__ a house. Two years later, Bill’s father died (去世了) and ____45____ him some money, so they bought a  house..When they moved into ___46___ for the first time, one of Bill’s friends sent him a bottle of wine _____47____ a present. The bottle was in a paper box.
At that time, Bill and Kate had a lot of ____48___to do. They had to clean the house and decided where to  put  their TV sets, beds, cupboards, desks and tables. They were so busy  that they forgot about the bottle of wine. They put it in a cupboard and didn’t ____49___open the paper box. A few months later, when they had a baby, Bill __50___ some friends to his house. He thought of the wine and found it out from the cupboard. It was so sweet.   Bill had never thought that would be the best present for the wonderful party for his wife and his baby.