1 . ________ is our duty to build a human community with a shared future. (用适当的词填空)

3 . When I invited her to a movie, she said she might not be able to make _______ to the cinema. (用适当的词填空)

4 . You can barely rely on ________ that the selfish guy will give you a hand when you get into trouble. (用适当的词填空)

5 . Most of us take ________ for granted that our parents should give us everything. （用适当的词填空）

6 . We scientists take ________ for granted that it is perfectly possible to live and not know. （用适当的词填空）

7 . ________ occurred to her that these were signs of an approaching tsunami. (用适当的词填空)

8 . I find it ________ (believe) that people should hunt endangered animals just for fun. （所给词的适当形式填空）