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

(2010·江苏)—I prefer shutting myself in and listening to music all day on Sundays.—That's ________ I don't agree.You should have a more active life.

 What is even more important is_____ the earth cooled down, water began to appear on its surface. 

---Tell me something about your adventure in the rainforest, please.---We lost our way in the forest and ___ made matters worse was ___ night began to fall.

_______ difficulty we meet with, we must finish it on time, because the opportunity is_______ valuable．