( ) 1. _______. Don’t give up. I am sure you can win the game.
A. Look out B. Come on C. Excuse me D. Be careful
( ) 2. —Do you know him well? — Sure. We ________ friends since ten years ago.
A. were B. have become C. have been D. have made
( ) 3. Hurry up! The class ________ for about five minutes.
A. has begun B. began C. had begun D. has been on
( ) 4. I spent my summer holiday in Hong Kong. It was really a ________ experience.
A. colourful B. beautiful C. meaningful D. useful
( ) 5. Mr Black _______ China since the summer of 1998.
A. has been in B. has been to C. has come to D. came to
