May 12th,2008 is a special day,________, I think,that will be remembered by the Chinese forever.
He transplanted the little tree to the garden _____ it was the best time for it.
“Is there _____ here?” “No, Bob and Tim have asked for leave.”
I'll come to see you if _____.
—Must I turn off the gas after cooking ? —Of course . You can never be _______ careful withthat.
_____ is known to everybody, the moon travels round the earth once every month.