1 . 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)

2 . What worries us most is ________ let out the secret. (用适当的词填空)

3 . Li Ming is my friend ________ that’s ________ I have offered to help. (用适当的词填空)

4 . That was ________ none of the children thought it unusual that David had decided to join the cross­country team. (用适当的词填空)

5 . Actually girls can be __________ they want to be just like boys, whether it is a pilot, an astronaut, or a general manager. （用适当的词填空）

6 . The best part of the art work is ________ people can think of something of their own.(用适当的词填空)

7 . The tube is ________ people call the underground in London. (用适当的词填空)

8 . This is ________ I went there by train. (用适当的词填空)

9 . What worries me most is ________ we make him feel at home. (用适当的词填空)

10 . Taking a year off from school to travel abroad is ________ is generally called a gap year. (用适当的词填空)