1 . I signed up for the program with the aim of c______ (挑战) myself. (根据中英文提示单词拼写)

2 . The president spoke at the business meeting for nearly an hour without r________ to his notes. （根据首字母单词拼写）

3 . He began his class by r________ to the early history of India. （根据首字母单词拼写）

4 . He delivered the wonderful speech without r________ (参考)to his notebook. (根据中英文提示填空）

5 . From James’s face, I could see he was terrified of being a ____________by us.

6 . He tried to stop us ________(出版) it but later we were proved right. (根据汉语提示单词拼写）

7 . He went to a big city for a good job after g______ from university.