In western culture,21 was the age________ young people traditionally received a key to their parents’ door, as a symbol of entering adulthood.
He says all _______ tried their best and that all that can be done _______ been done.
. When the moon had risen, we _______ on the grass, listening to the light wind ________ in the trees.
. If I can help ______, I don’t feel like working _______ late into the night today.
—We’re going rock climbing tomorrow. Why not join us? —_______ It’s said that there might be a thick fog then.
. ________ is known to us all is _______ the 2008 Beijing Olympic Games is a great success.