Complete the text with suitable prepositions: —

We got our freedom (a) _____ the sacrifice of hundreds and thousands (b) _____ lives. The patriots (c) _____ our land fought (d) _____ the oppression of the West Pakistani rulers. Finally, the oppressors were bound to surrender (e) _____ our freedom fighters. But a great number (f) _____ the sons of the land died (g) _____ the war. Soon (h) _____ the war, the government (i) _____ Bangladesh founded the National Memorial (j) _____ memory of the martyrs.