1．The mountain climber clung to the edge ____________ a desperate attempt to save herself.
答案：in
2．She now has ____________(authorize) over the people who used to be her bosses.
答案：authority
3．We’ll be desperate ____________(defend) our motherland once she is in danger.
答案：to defend
4．The pupils owed their success ____________ the teachers’ care，correct education and strict management.
答案：to
