(Jerry and Mark are in the science museum.) A:Hi,Jerry. (1)
What's this
What's this
?It looks interesting.There are dragons and toads(蟾蜍)on it. B:Oh,it's a great invention of ancient China. A:Really?(2)
When was it invented
When was it invented
? B:It was invented in the Han Dynasty. A:(3)
Who was it invented by
Who was it invented by
? B:It was invented by Zhang Heng. A:(4)
What was it used for
What was it used for
? B:Guess! A:Is it used for holding water? B:No,it is used for testing earthquakes. A:Testing earthquakes?That sounds amazing!Let's go and find more inventions. B:(5)