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Belarus is a large country ... (10) north east Europe . The location of Belarus is also an advantage. Belarus is situated ... (11) the heart ... (12) Europe and surrounded ... (13) Russia, Poland, Ukraine, Lithuania, and Litva.
10. A) at B) in C) by D) of
11. A) at B) in C) by D) of
12. A) at B) in C) by D) of
13. A) at B) in C) by D) of​