She said she was glad the difficulty had been _____.
--- I didn’t tell my parents the secret yesterday. --- But you ______.
In 1911, Madam Curie received a second Nobel Prize for her research, the first person in the world ______ two Nobel Prizes.
--- The floor is dirty. Can anyone clean it?--- ______. I do it all the time.
In the face of ______ failure, it is the most important to keep up _____ good state of mind.
He was always _______ for knowledge, and at last became an expert in the field of art.