Although the increase in the present sum used for the research is________， a great breakthrough could still be achieved by the end of this year.

Such a grammar mistake is _____ among the beginners of English study.5.      

 21st Century is ______ a newspaper． It helps us to improve our English a lot．

He was an _____ poet at that time and his _____ poems spread through all the country.

One of my close friends made great progress in her studies so her teachers ___ her, and I _____ her.