补全对话A:Did you read the story about"Dr Bethune"?B:Yes,I______

补全对话
A:Did you read the story about"Dr Bethune"?
B:Yes,I__________.
A:What did the story tell us__________?
B:It told us about a famous_______form__________.
A:When didi he come to China?
B:In 1938.
A:_________did he come to China
B;He came to China to_______the Chinese people.