The Second Period—Section A(3a－4c)
Teaching Important Points 【教学重点】
Key words & phrases：
ruler，boil，remain，smell，national，trade，doubt，fridge，low，somebody，translate，lock，ring，earthquake，sudden，bell，biscuit，cookie，musical，instrument
by accident，take place，fall into，make tea，less than，without doubt，all of a sudden
Key sentences：
1.Did you know that tea was invented by accident?
2.Most people believe that tea was first drunk about 5，000 years ago.
3.It is said that…
4.It is believed that…
5.In England，tea didn't appear until around 1660.
Key structure：
S＋was/were＋past participle＋…
eg：One of the world's favorite drinks was invented by accident.
