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

As we know, big cities are good opportunities lie.

_____ the doctors really doubt is _____ my mother will recover from the serious disease soon.

____ made the school proud was _____ more than 90% of the students had been admitted to key university .

  He didn't go by bike with me.That's ________ there was something wrong with his bike.