They are all very clever, but _______of them could work the problem out.
A recent study has ________an unexpected conclusion that the African elephant should be divided into two different species.
The decision about which college to go to cannot be made by any one of us________yourself.
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.