You spend too much time on your mobile phone. You are supposed to ____ the time you spend on it.( )
A.cut offB.cut downC.cut up
()—Do you believe that paper is made ________ wood? —Yes, I do. And you can see that books are made ________ paper.
Guangdong is ____ the south of China .
I read an article ________ a young writer ________ the UK last week.
---There are some pictures ________ the wall. What ________ can you see? ---I can see two windows ________ the wall.
Look! There are ________ birds ______the tree.