If a substance has a higher density, ____ 2, 000kg/ m³, it will not float on water.
______ these models several were exciting, ____ of them exactly right.
—Did you reach the top of the mountain? —Yes. Even I myself didn’t believe I couldit.
His aunt’s lettershim of those beautiful days when they used to live together in his hometown.
He has been fired and will have toover charge of his office tomorrow.
As is known to us all, failure usually _ __ laziness while diligence can ______ success.