Question

5) What is the meaning of "put your back into it"?, "doing your bit'?

6) Paraphase: "You are like a wheel... millions of people"
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Answer 1

Answer:

5.put your back into it. From Longman Dictionary of Contemporary Englishput your back into itput your back into itinformal to work extremely hard at something If we really put our backs into it, we could finish today.