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《Reading and vocabulary》最新PPT课件优质课下载
Para 5: Definition
Para 6: Suggestions
Para 1: Introduction
Para 2: Definition
Para 3: Causes
Para 4: Effects
Para 5: Suggestions
Para 6: Measures
Raise a problem
Analyse the problem
Solve the problem
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5
4
3
2
6
1) Sandstorms which sometimes affect Beijing can be forecasted some months before arriving in Beijing.
Back to competition
2) Land becomes desert only because people cut down tress and dig up grass.
1. Choose the best answer.
Sandstorms are strong winds carrying ___________ through the air.
A. dirt and mud
B. rain and heat
C. sand and dust