— Do you know in ancient China?— I have no idea. But I know people once used tree leaves to make paper.
-Do you know the girlis talking with our teacher? -Oh,she is my sister.
-Look! Who’sboy over there? -Oh,he is my cousin,Bob.He ishonest boy.
I think English is ______ useful language, and it’s also ______ important language.
____weather! It’s always raining!
Do you know the man_______ saved five people in the fire?