QUES: Here you can buy cheap knitted winter hats and order online

correct the punctuation.

CORRECTED: Here you can buy cheap knitted winter hats and order online!

QUES: Want to know about MOV repair tool

correct the punctuation.

CORRECTED: Want to know about MOV repair tool?

QUES: But in the later 1950s the US Senate Labor Committee under the chairmanship of John McClellan which had been investigating corruption in American labor unions began to investigate Dave Beck and the Teamsters Union Robert Kennedy was the Committee counsel responsible for this investigation

correct the punctuation.

CORRECTED:
But in the later 1950's the U.S. Senate Labor Committee under the chairmanship of John McClellan which had been investigating corruption in American labor unions began to investigate Dave Beck and the Teamsters Union. Robert Kennedy was the Committee counsel responsible for this investigation.