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3: The earth shakes (摇晃)
What natural disaster is it?
earthquake
Earthquakes will kill thousands of people.
成千上万
['??θkwe?k]
1: often happens in Beijing
2: people can’t see clearly
3: be full of sand
What natural disaster is it?
sandstorm
['s?n(d)st??m]
typhoon
The boy ______ _______(walk) home when the typhoon came.
was
walking
was walking------过去进行时
（表示过去某个时间点或时间段正在发生的事情）
结构： was/were + doing
Eg: 1. 昨天晚上9点你给我打电话时，我正在看电视。
I ______ __________ ______when you called me at 9 p.m. last night.
was watching TV
2. We __________ (have) breakfast when the doorbell rang yesterday.
were having
The girl ______ _______(do) her homework when the thunder and lightning came.
thunder and lightning
was
doing
A man and a woman _______ ________(walk)
in the water.