Vocabulary Booster১টি পরীক্ষায় এসেছেপ্রশ্ন ১৪Identify the meaning of the phrase 'a cog in a/the machine.'কA very important leader in an organization.খA small or insignificant member of a larger organization or system.গA malfunctioning deviceঘSomeone who controls everythingউত্তর দেখুন