only few resistant (‘develop’ is also spelt wrongly) I agree with you ( period of aviation ). We are only talking about one period (the ‘early’ period).
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4. Being the biggest expanse of brackish water in the world, the Baltic Sea is of special interesting to scientists.
5. The main advertising media include direct mail,
Averell
Thank you!
But could you explain more detail about the problems of the 2nd sentence.
Anonymous hii want to khmow why "newspaper" is wrong?hi it should be newspapers