There are six floors ______our school building. Our class is ______ the third floor.

The computer was invented in the 20th

h has a large vocabulary, doesn’titYes. morewords and expressions and you will find it easier to read and communicate.

Mike is often absent from class. — Tell him he _____answer for it if he goes on behaving like that. [ ]

1– __ behind the door –No,they aren’t.