---Do you know what presents they will buy for our teachers on Teachers' Day?---No, they keep the secret to __________.
Many young people play ___________ soccer in their free time. A. a B. the C. /
I don’t see ___________ about the photo, ___________.
—May I put my car here? —Sorry, you mustn’t. Look at the sign, it says “_______”.
Can you help me fill this box _______ those books?
There are many shops on ____ side of the street. We can buy everything we want.