单句语法填空
【小题1】He ________ attend the meeting the day before yesterday, because I saw him enter the meeting room.
【小题2】When ________ earth did you go to see your parents last month?
【小题3】She decided to take the exploration by herself, ________ she knew that it was dangerous.
【小题4】I wonder where ________ was that you lost your credit card.
【小题5】It was my mother who ________（teach）me to be curious about everything around me.
【小题6】This is the ________ book that I have been looking for.
【小题7】I'm still wondering ________ it was that put the Christmas gift under my pillow.
【小题8】There are more than 740 million Chinese people ________（expose）to second-hand smoking in public places now.
【小题9】To their ________（disappoint）, the result was contrary to their expectation.
【小题10】Many diseases arise from ________ people really don't know about in their daily life.