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

Mike is good at sports. He jumps much _______ than the other boys in the class.

Some of the heat near the surface of the earth _____ electricity

Which is your teacher——The one _________ thick glasses is.

Mr Li _____Kunming . He _____ the city three times . This time he _____ Kunming for three days .