Shanghai is the first city in the world ____a high-speed maglev train, from the city to Pudong Airport.
-_____ you read the story?-Yes. I _____ it at school.
There is only one more day to go ____ your favorite music group play live.
-Must I turn off the gas after cooking?- Of course. You can never be ______ careful with that.
Mr. Green stood up in defence of the 16-year-old boy, saying that he was not the one ______ .
Of the two sisters, Betty is _____ one, and she is also the one who loves to be quiet.