_______ industrialization, we have to cope with the fact that many species are in danger of extinction.

He is very worried about his new job _______ he is not quite prepared for working.

Up to now, _______ space exploring still remains _______ very risky, complex, and expensive endeavor. [endeavor: effort]

Within _______ few years, _______ private space travel has gone from concept to reality.

In the future, the number of tiny but _______ computers you encounter every day will number in the thousands, perhaps millions.

What will the relationship between computing and _______ bring us over the next 15 years?

Not until the early 1900s ________ to vote in the United States.

________ hungry, he stopped to buy a bar of chocolate.

Nowadays, young men with a technical education _____because of the great demand for highly skilled workmen.

It is no use ________to school if you ________ to work hard.