1) Which is the right answer? a) I have know her for 2017 b) I have know her since 2017 2) I have worked on this project for 3 weeks a) I started working on this project 3 weeks ago b) I last worked on this project 3 weeks ago c) It is 3 weeks since I last worked on this project 3) Which is the right answer? a) I've studied English for 2 years b) I've studied English since 2 years

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