Experiments in the sonic imaging of moving objects .......... in both the United States and Europe well before the Second World War.

On Mercator's maps, the far northern and southern polar regions are______________.

On the slope of Long’s Peak in Colorado ……. The ruin of a gigantic tree.

The earth spins on its axis and _________23 hours, 56 minutes and 4.09 seconds for one complete rotation.

Employers often require that candidates have not only a degree, ________________.

Antonio Gaudi, architect of Barcelona's Holy Family Church, died before _________ the structure.

Not only knowledge and skills, but also attitudes _________ in school for student's future adjustment to society.