According to    1     new study by the WHO(World Health Organization), about 25 percent of adults worldwide do not get enough exercise. Because of this, about 1.4 billion people are     2     greater risk of developing     3     (dead) diseases such as heart disease and cancer.

When it comes to     4     (exercise) more, experts say that people needn't go to the gym every day. There are other ways to exercise. For example, we can take the stairs instead of taking an elevator. And standing on one leg for 30 seconds each day     5     (be) also good for our health.

The study also finds that women are less active than men because    6     (them) tend to spend more time at home taking care of     7     (child) and doing housework.

Countries with higher incomes show higher rates of inactivity. For example, people in Kuwait and the United States exercise less     8     people in Uganda and Nepal. This is partly because in     9     (develop)areas, desk jobs have taken the place of physical labor and cars     10     (replace) walking.

English is a language     1    (bring) to Britain in the 5th century by Anglo-Saxon settlers from various parts of Northwest Germany. It is convenient to divide English into three periods roughly─Old English, Middle English, and Modern English.

The     2    (early) form of English is called Old English or Anglo-Saxon. Old English developed from a set of North Sea Germanic dialects     3    (origin) spoken along the coasts of Frisia, Lower Saxony, Jutland, and Southern Sweden by Germanic tribes known     4     the Angles, Saxons, and Jutes. Later, Old English was strongly influenced by the North Germanic language Norse, spoken by the Vikings who settled mainly in the northwest. The most famous work from the Old English period is the epic poem Beowulf, written by     5     unknown poet. Old English is very different from Modern English and difficult for the 21st-century English speakers to understand.

For the 300 years following the Norman Conquest in 1066, the Norman kings and the nobility spoke only a     6    (vary) of French called Anglo-Norman. English continued to be the language of the common people. The Norman influence     7    (strong) the continual evolution of the language over the following centuries, resulting in     8     is now referred to as Middle English. And one of the best-known works from the Middle English period is Geoffrey Chaucer’s The Canterbury Tales.

From the late 15th century, the language changed into Early Modern English, often dated from the Great Vowel Shift. English is continuously absorbing foreign words, especially Latin and Greek, causing English to have the largest vocabulary of any language in the world. By the late 18th century, the British Empire had sped the spread of English through its colonies and geopolitical dominance. Commerce, science and technology, diplomacy, art and formal education all contributed to English     9     (become) the first truly global language. As there are many words from different languages, the risk of mispronunciation is high. In 1755, Samuel Johnson published his A Dictionary of the English Language,     10     introduced a standard set of spelling conventions and usage norms.