科普2011课标版《Section A》精品PPT课件下载-普洱市优质课

2.Talk about the sandstorm and its harm.

many trees

cut down

砍到

forests gone

wash the earth away

冲走

change into desert

转换成，变成

沙漠

e.g. A lot of rich land has changed into desert because people have cut down too many trees.

sandstorms

come into being

形成

n. 沙尘暴

3 Do you know how sandstorms come into being? Number

the pictures and talk about the sandstorm in groups.

( )

( )

( )

( )

( )

( )

4

1

5

3

6

2

wash the earth away