1 . Determination and optimism are ________ it takes to conquer your fear and accomplish your goal. (用适当的词填空)

2 . As we all know, reading classics is of great importance to us. This is ________________ it can not only improve our studies but also enrich our everyday life. (用适当的词填空)

3 . The amazing thing about the spring is ________ the colder the temperature gets, the hotter the spring! (用适当的词填空)

4 . ________________ matters to a museum is not how many visitors it has, but ________________ close it is to people’s daily lives. (用适当的词填空)

5 . Bob had seen the film before. That was ______ he did not see it yesterday. (用适当的词填空)

6 . Bruce did not watch the game last night. That was ______ he had to help his little sister with her homework. (用适当的词填空)

7 . The reason why human culture can be exchanged and spread is ______ the civilization itself has deep value. (用适当的词填空)

9 . The reason for my return is ______ I left my keys behind. （用适当的词填空）

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