Protecting Florida’s coral reefs is difficult because of the corals are very fragile even the touch of a diver’s hand can kill it .

Many spacemen could never get back to the Earth because of ____ accidents. 

The shore patrol has found he body of a man who they believe to be missing (marine biologist.

Some critics have called Theodore Dreiser’s book Sister Carrie a  mod novel because it broke so many traditions.

The bodies of cold-blooded animals have same temperature their surroundings, but those warm-blooded animals do not.

Everyday in summer, but especially at  the weekends, all kinds of vehicles bring crowd of people to enjoy various attraction 

Every scientist know that gravity is the force that maintains the earth and the planet its orbit around the Sun.

That lecturer, his name I have forgotten, is very well-known .

When the children realized that they were by themselves the dark, they became really frightening

Choose the correct answer to complete.  "They have much homework that I ought ____"

Most of the students in this class __________ from South Africa

Each stanza of a poem has a repeatable pattern of meter and rhyme and is normally division from the following stanza by blank line

It is becoming extremely difficult to grow enough to feed the world’s rapidly increasing population.

A 1971 U.S government policy not only put warnings cigarette packs but also ban tele advertising of cigarettes.

His roommate is not very clever student, but he certainly works hard indeed

Many efforts have been made to _________the environment. 

In the early twentieth century, there was considerable interestin sociologist in the fact that in the United States the family was losing its traditional roles

There are different and similarities between Vietnamese and American culture

Wealthy people have always desired and wear precious stone because their beauty is lasting 

Before she moved to California, with its much climate, Betty found that health improved considerably.

Transfer taxes are imposed on the sell exchange of stocks and bonds.