It ______ have been Tom that parked the car here, as he is the only one with a car.

Only one of the job applicants can keyboard as fast as （）.

In ______, the only element that can be deleted or removed is the one that was inserted most recently.

It is apparent that there was not sufficient depth of water（）and I claim that the estimated arrival draft as radioed to the agent to report to you was a close one.

In(74), the only element that can be deleted or removed is the one that was inserted most recently.

● In （74） the only element that can be deleted or removed is the one that was inserted most recently.（74）

Yellow Stone National Park is one of the older parks in the U.S.It was established by Congress in 1872.

Practice 1　　No one knows what time itself is. We cannot see it. We cannot touch it. We cannot hear it. We know it only by the way we mark its passing. For all our success in measuring the tiniest parts of time, time remains one of the great mysteries of the universe.　　One way of thinking about time is to imagine a world without time. There could be no movement, because time and movement cannot be separated. A world without time could exist only as long as there were no changes. For time and change are linked. When something changes, you know time has passed.

The album is as it was the only one ever signed by the President.

One of the signs of the awakening of the American Indians is（）

One of the signed bills of lading is accomplished，the others shall（）.

Only by using a large amount of medications prescribed by doctors can one avoid the risk of atherosclerosis and its complications.