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The day Mount St. Helens erupts – level 1

18-05-1980

Mount St. Helens is a volcano. It is in the US....



The day Mount St. Helens erupts – level 2

18-05-1980

In March 1980, there were several small earthquakes near Mount St....



The day Mount St. Helens erupts – level 3

18-05-1980

On March 15, 1980, several small earthquakes indicated that magma may...



The day the Cultural Revolution started – level 1

18-05-1980

Mao Zedong is the leader of China after World War II....



The day the Cultural Revolution started – level 2

18-05-1980

After World War II, the leader of the Communist Party in...



The day the Cultural Revolution started – level 3

18-05-1980

Mao Zedong was the chairman of the Communist Party of China...



The day McDonald’s was founded – level 1

15-05-1940

The first McDonald’s restaurant opens in California. It is on May...



The day McDonald’s was founded – level 2

15-05-1940

The original McDonald’s restaurant was opened in California on May 15,...



The day McDonald’s was founded – level 3

15-05-1940

The original McDonald’s restaurant was opened in California on May 15,...



The day of a successful vaccination – level 1

14-05-1796

Smallpox is a very dangerous illness. It kills people. Cowpox is...