In this experiment, they are wakened several times during the night, and asked to report what they _____.
What he said,_____, has nothing to do with what he did.
—— There will be a storm soon. —— I am afrai?_____.
_____ heat is different from temperature?
_____ his face, the young man must be over 20.
He said_____his sister had passed the entrance examination of college, and_____she would go to college in about 20 days.