A feather falls slower than a stone only because the air holds the feather back more than it ______ the stone.
Thechildren,______hadplayedthewholedaylong,werewornout.
It was April 29, 2001________Prince William and Kate Middleton walked into the palace hall of the wedding ceremony.
TsinghuaUniversity,_____in1911,ishometoagreatnumberofoutstandingfigures.
She has a gift for creating an atmosphere for her students _______allows them to communicate freely with each other.
—It'snice.Neverbefore________suchaspecialdrink! —I'mgladyoulikeit.