Ⅰ.单句语法填空
1．The professor was delighted ________(find) that two thirds of the project had been finished by the students independently.
2．Any help from you will be greatly appreciated.Please give me a reply at your earliest ________ (convenient)．
3．Only when we match our words with actions can we make a ________ (different) in whatever we hope to accomplish.(2013·江苏，书面表达)
4．Seeing a Bengal tiger is quite ________ (thrill)．(2014·重庆，阅读D)
