从方框中选择恰当的句子,补全对话 .

从方框中选择恰当的句子,补全对话 .
从方框中选择恰当的句子,补全对话 .
A:Hi ,Ann
B.Hi ,Bill .
A:（）There is so much sand and dirt in the air .
B:（）Have you heard of the sandstorm
A:().
.B:There is lots of sand flying in the air when the wind is blowing strongly .So we can’t see anything clearly outside
A:()
B:People do something harmful to destroy the environment ,such as cutting down too many trees .
A:() I think we still need to work hard to protect our environment
B:Yes ,I agree with you
（A.No ,I haven’t What’s that
B.But what causes these sandstorms?
.C.That’s too bad
D.So it is
E.What bad weather
F.What s fine day
G.So is it ）