The reform has changed the whole nation. It cannot remain ________ it used to be.

 I am afraid he’s more of a talker than a doer, which is ______ he never finishes anything.

The reason________he was late was ________he missed the train.                  

Part of the reason Charles Dickens loved his own novel, David Copperfield, was ________ it was rather closely modeled on his own life.(2010·北京)

Much to the couple’s comfort, their income is now double ________ it was five years ago.