1 . Directions：Fill in each blank with a proper word chosen from the box. Each word can only be used once. Note that there is one word more than you need.

A. recently 　　　　B. estimated 　　　　C. employing 　　　　D. definition 　　　　E. confusing F. updated 　　　　 G. scientific　　　 H. argument 　　　I. depending 　　　J. distinct 　　　K. finally

Most of us learn at primary school that there are seven continents, but the next generation of kids may be adding one more to that list.

According to a recent paper published     1     in the Geological Society of American Journal by a group of researchers, “Zealandia” is a new continent that’s hidden beneath the ocean.

Zealandia is     2     to be five million sq. km. Most of this massive area is covered by water, but its highest mountains already have their own name: New Zealand.

The small country is the only part of Zealandia that isn’t underwater, but the paper’s authors want the huge landmass to be recognized worldwide as its own continent.

“The     3     value of classifying Zealandia as a continent is much more than just an extra name on a list,” the researchers wrote in their paper.

Scientists discovered Zealandia all the way back in 1995, then started extensive research on the area     4     underwater and satellite mapping technology. After completing their work, they were     5     able to write a report suggesting that Zealandia be named a continent.

But who decides on what is a continent and what isn’t? There is, in fact, no official organization that does. Some countries’ schools teach that there are six or even five continents. This changes     6     on where in the world school is.

Due to their     7     as a “continuous expanse of land”, some classify Europe and Asia as the same continent --known as Eurasia. Schools in Russia and parts of Eastern Europe teach this.

And to make things even more     8    , France and Greece, as well as other countries, classify North America and South America as simply America.

This     9     over how land is defined has even stretched into outer space. In 2006, the International Astronomical Union（IAU）decided that Pluto was no longer a planet, 76 years after its discovery in 1930. Experts argued that it no longer met the requirements needed to be called a planet alongside the eight others in our solar system. It was therefore renamed a “dwarf planet（矮行星）”，meaning that countless books, models and museum exhibits all over the world had to be     10    .

But will the world take the same notice of Zealandia? The best way to tell is to keep an eye on our textbooks.