Two unique features of the Arctic they are lack precipitation and permanently frozen ground.

What are common known as “lead” pencils are not lead, but  a mixture of graphite, clay and wax.

The authorities are worried about the increase of drug abue

Sixteen people showed _____ for her volleyball training session. 

Hundreds of species of Hawaiian flowers have become extinct or rare  ............... land development and the grazing of wild goats.

Geologists find it useful to identification fossils inrock sample because certain assemblages of species are characteristic of specific geologic time periods.

The orangutan’s hands and feet arc designed for holding and grasping branches, dud powerful immensely arms enable it to climb and swing in trees without difficulty.

Genetic engineering is helping researchers unravel the mysteries of previously incurable diseases so that they can getits root causes and find cures

The central purpose of management is for making action or decision helping achieve a carefully chosen goal.

Author has not rarely written anything that was not a best-seller

It is difficult to get used to sleep in a tent after having a soft comfortable bed lie on.

Everyone knows about the pollution problems, but not many people have _____ any solutions. 

Most of damage property attributed to the San Francisco earthquake of 1906 resulted from the fire that followed.

The harder he tried, the worst he danced before large audience.

The influence of the nation’s literature, art, and science have captured widespread attention.

The food that Mark is cooking in kitchen is smelling delicious

Student must make up their own study list of the classes he is going to take at the beginning of the quarter.

If anything urgent comes _____, you can contact me at this number. 

The amount of books in Library of Congress is more 58 million volumes.

Mosquitoes are such fast breeders that it is almost impossible to control them either by draining areas where they breed or to spary them with pesticides

Armstrong was the first person to set ________on the moon.