QUESTION: Fix punctuation: The Iron Curtain which had opened to let the invaders of Palestine leave opened again to allow arms to reach them in decisive quantities
ANS: The Iron Curtain, which had opened to let the invaders of Palestine leave, opened again to allow arms to reach them in decisive quantities.

QUESTION: Fix punctuation: Chocolate Milk Brown is an indulgent brown with a touch of creamy white
ANS: Chocolate Milk Brown is an indulgent brown with a touch of creamy white.

QUESTION: Fix punctuation: Mast Raising System System for raising and lowering the mast making it a quick oneperson task
ANS: Mast Raising System -System for raising and lowering the mast making it a quick one-person task.

QUESTION: Fix punctuation: The country is proceeding democracy with an election for parliament held in 2010
ANS:
The country is proceeding democracy with an election for parliament held in 2010.