We stayed there and watched the opera ______ an hour.
| A．in | B．for | C．at | D．on |
Mr. Smith came to our school in 2003. He _____ here for 10 years.
| A．works | B．worked |
| C．will work | D．has worked |
Some boys of Class One enjoy _____ pop music.
| A．listen to | B．listens to |
| C．listening to | D．listened to |
— Who listens ______ , Eric , Brad or Rick? — Of course Brad.
| A．the most carefully | B．more carefully |
| C．the most careful | D．more careful |
Mum, Harry Potter is my favorite great book. I ______ it three times already.
| A．read | B．am reading |
| C．will read | D．have read |
Liu Xiang was born in Shanghai _____ 13th July, 1983.
| A．at | B．in | C．on | D．to |