—Why don’t you go to visit the Great Wall with us?—Because I _______ there many times.
--____ is your father? --He is fine. Thank you.
–Where is the sofa? --______.
–What’s this? -- ____ is a key.
Tom and I ____ good friends, Tom’s grandparent ______ a teacher in our school.
I have a color pencil, he ____ one , too.