The math problem is so hard. I really don’t know _____.

Could you help me work out the maths problem, Mrs Zhao — . What is it

India attained（获得）_______ independence in 1947 after _______ long struggle.

Please remember to _____ a stamp _____ your envelopebefore you post it to your friend

The good thing about children is that they _____ very easily to new environments.