Vocabulary Booster১টি পরীক্ষায় এসেছেপ্রশ্ন ১১The term 'A cog in a/the machine' refers to -কক) a chain of events in which the response to one difficulty creates a new problem that aggravates the original difficulty. খখ) a usually little-known contender (such as a racehorse) that makes an unexpectedly good showing. গগ) a small or insignificant member of a larger organization or system. ঘঘ) something notably different.উত্তর দেখুন