The Science Museum, ______we visited during a recent trip to Britain, is one of London’s attractions.

Listening to peaceful music. as well as taking exercise,___________ a lot in relieving people ‘s sad emotions.

Hey, Eric! What has happened— The lift is broken again! You know, I live on the _________ floor.

Open Twenty, first your books and turn to Page ____and look at ____ picture .

149 We won’t have _____ without your help