85．There won’t be such species _________________ (存在) in nature in 100 years.

84．Genius is one percent _____________(灵感) and ninety-nine percent perspiration.(汗水)

83．Having been devoted to his work for many years, John was finally _________(提升)to general manager.

82．The boss has difficulty ______________(投入) such a vast sum of money in the project

81．My parents thought it was ___________(反常的) for a boy to be interested in ballet.(芭蕾)