South Korean rapper PSY’s hit song Gangnam Style made history on December 20 as first-ever video on youtube. com to reach 1 billion views.

Lily and Liz _______ a cat. They like it very much.

Are these books______一No，they are not mine. They belong to .

This machine is very easy ______. Anyone can learn touse it in a few minutes.

The question_____ at yesterday’s meeting hash’t been made _____yet[ ]