1．Do you think children who lived a thousand years ago had toys？Believe it or not，they did!
（71）Dtoys were very simple compared to the toys that you play with every day．They were mostly handmade from things that were found in （72）C，like stones，wood or clay．
Children played with a few types of toys through the 1600s．During the 1700s when George Washington （73）HPresident of the United States，scientists began to discover and invent more （74）B to make toys．They could not only use stones，wood and clay，but also use cotton，leather（皮革） and paper．
Hand-carved wooden toys were popular with （75）Lthrough the early part of the 1800s．Because it （76）Itime to hand-make wooden toys，only a small number could be sold at a time and they were （77）A．Toy makers looked for ways to make toys affordable for all children to enjoy．
The invention of machines changed how things were made in the 1800s，（78）F toys．They helped make toys faster than by hand and in larger numbers，so toys could be more affordabe．Machine-made toys were very popular among toy makers and children （79）K they could be shaped and cut to look like real-life things．
Thanks to the hard work by inventors，scientists and （80）G，toys today are made from stronger and safer types of materials．Although many toys are still made from wood，metals and plastics，there are strict rules on how they can be used in toys．
A．expensive B．materials C．nature D．Their E．a(chǎn)sked F．especially
G．engineers H．became I．took J．This K．because L．children |
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