________ many changes have _______, we should keep pace with the changes too.
It is you, I think, rather than your wife, _________ to blame for your son’s bad behavior at school.
As is known to all, Montreal is the second largest French-speaking city in the world, ______.
I _______ have been more than six years old when the accident happened.
Men usually go straight to ________ they want and leave quickly when shopping.
In the reading-room, we found Winifred ____at a desk, with her attention _____on a novel.