The air in our city is getting much_____ now than a few years ago.
—__________ great progress she’s made in the past month! —Exactly. To my _________, she’s really changed a lot.
—We can’t be successful _______ we keep working hard. —I agree with you.
_____ you ______ your brother can join us. We want one of you.
The number of swimmers ______ getting larger and larger. Look, a number of students _____ swimming in this river.
—Why do you look so sleepy in class, John? —Sorry, sir. I _____ to watch a football match last night.