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Which of the pairs of sentences below are similar and which are different?
1. 'Do you want to buy that CD,John?' Asked Marian.
Marian asked John if he had bought that CD.
2. My friend says that it's necessary to get to the concert by 7 p.m.
My friend says that we don't have to get to the concert by 7 a.m.
3. I started playing the guitar five years ago and i still play it now.
I played the guitar for 5 years.