In the following passage some words have been deleted. Fill in the blanks with the help of the alternatives given. Select the most appropriate option for each blank.
In July, 1937, the Japanese used an incident to provoke a war. They (1) ______ China and occupied a major portion (2) ______ it. Chinese and Japanese (3) ______ clashed in northern China, throwing the entire country into (4) ______. Millions of people were shot (5) ______ death.
Select the most appropriate option to fill in blank number 4