He never goes home before he will finish work.

We can trust Jim. He is the kind of person who always _____ his promise. 

Trees are designed as neither hardwoods or softwoods.

All root vegetables grow underground, and not all vegetables that grow underground roots

Unfortunately, much of the early history of Zimbabwe is still unknown, for example, we know a little about early patterns of settlements.

Somehow without my noticing , my wallet had been disappeared.

So far most a million different species of insects have identified and named.

Internet , definitely causes some in society , however, it surely provides many benefits as well.

The authorities are worried the increase of drug abuse.

The prices of homes are as high urban areas that most people cannot afford to buy them

Approximately 80 percen farm income In Utah are derived from livestock products 

Established about 1300, the Acoma Pucblo in New Mexico is believed to be oldest continuously occupied settlement in United States.

John said that if he  .............. rich, he  ................  a lot.

The dish ...................

Basic elements of public-opinion research are interviewers, questionnaires, tabulating equipment, and to sample population.

Frank Lloyd Wright has been acclaimed  by colleagues as the greater of modern architects

For many years, people have wondered that life exit elsewhere in universe.

Because the tachinid fly is a parasite of harmful insects, much species have been imported into United States to combat insect pests

Duke University in North Carolina has an outstanding collecting documents concerning history

Choose the word or phrase among A, B, Cor D that best fits the blank space :
If boredom …….., there are plenty of windows from which to admire the ever-changing scene as the International Space Station orbits the planet every 90 minutes.

About 200 million years before, all the continents were part of vast land mass called Pangaea.