1 . This is ________ my father has taught me—to always face difficulties and hope for the best. (用适当的词填空)

2 . The problem is ________ you can arrive at the airport in time or not. (用适当的词填空)

3 . Home is ________ you can find love and care. (用适当的词填空)

4 . They also need to be ready to give interviews in English with international journalists. This is ________ they need an English trainer. (用适当的词填空)

5 . The reason why I made so much progress was ________ your encouragement played an important role in my study. (用适当的词填空)

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

7 . The question is ______ will be selected to be the coach for the football team. (用适当的词填空)

8 . Mr. Darcy is quite rich but too proud, and that’s __________ Elizabeth doesn’t like him. (用适当的词填空)

9 . From space, the earth looks blue. This is ________   about seventy­one percent of its surface is covered by water. (用适当的词填空)

10 . The debate between them was ____________ it was worthwhile to afford the extra expense of hiring an expensive apartment.（用适当的词填空）