Faced with challenges, your ability is        makes a difference.

With time going by, we have come to realize that creativity is _______it takes to keep a nation highly competitive.

－Are you firmly against Japan’s decision to purchase the Diaoyu Islands?－Of course. That is _______ our basic interest lies.

(2013·安徽，21)From space, the earth looks blue.This is ________about seventy­one percent of its surface is covered by water.

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)