The Chinese kept silk production a secret because it was very important to their culture and economy for thousands of years.
He got angry because the effect of staying up all night affected his tolerance to take a joke.
Explanation:
By summer 1941, British intelligence agents were listining in on classified German radio transmissions that described systematic mass murders in Lithuania, Lavita, and later Ukraine. News allso came from the Soviets. On August 14th 1941, British Prime Minister Winston Churchill summarized the news in broadcast to the world.
Answer:
no it's not necessary to make all the things public
