It was not until 1911, _______ the first vitamin was identified, _______ people realized the importance of it.
The happiest people don’t have the best of everything.They just________everything.
—Will you join us in the Talent Show?—Thank you,________
She devoted herself________to her research and it earned her a good reputation in her field.
It is the third time so far that such a festival________in my hometown.
I failed again,but my parents encouraged me and told me that failure________the mother of success.