When did you check the contents of C02 cylinders（）.
The volunteers found the test more difficult when they did it the second time.
3.What did the player do when his way was blocked?
How did Alice finally find the document?She tried the ____________ name “Nova”.
How did the writer feel when she nearly knocked down her daughter in the kitchen?
When did Alice Munro win the Nobel Prize?
When did Cliff Young win the race?In the year ______.
When did the Red Kettle Christmas Campaign first start?
When did people do house cleaning in the past?
When did the modern Olympic games kick off in Athens, Greece?
When did he win the China's Got Talent competition?
When did the person go shopping with her mother?
When did Mongolian doctors begin to spread the knowledge of Mongolian medicine?
1. When did the earliest settlers migrate to the British Isles?
Why did descendants of Zhao She bear the name of Ma?
When the father and the son seperated,what did the father say?
What did the first salesman mean when he “showed his customer the door”?
How did Dr. Griffiths discover the gamblers' feelings when winning and losing？
When Amelia Earhart saw flames coming from the engine, what did shedo（）
The consumption of beer did not go down when the tax was raised.
--When did you feed the dog？ --____.
Why did people in the 1920s and 30s like to have something named with science？
What did the monster do when Felix struck him with a stick？
