Two years has passed since I ______you thefirst time．

.John is the only one of the students in the class that never______ a mistake even when it is pointed to him.

Part of the reason Charles Dickens loved his own novel, David Copperfield, was ______ it was rather closely modeled on his own life.

Would you like to go for a walk with us— _________, but I’m too busy.

I am surprised at the new look of my hometown, for it _____ a lot over the years.