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《Writing》集体备课PPT课件优质课下载
desert
pollution
last (v)
climate
mask
environment
cycle
blow
bury
frightening
protect
as a result of
have an effect on
dig up
be caught in
take measures to do sth
prevent...from doing sth
Discuss something
on sandstorms
refer to activity 2 and 3
on page 31
region
cause
influence
protection