—Why didn't you give a hand to the boy?—I __________ but he __________ to his feet before I tried to.
_____ is known to us all is that the 2010 World Expo will take place in Shanghai.
You may lie ______ the ground is dry.
He recognized me _____ he saw me.
The commander ordered that the wounded _____ to hospital at once.
_____ is known to all that oil and water don’t mix up.