While costs are the (3)_____ concern for a host city, there are other factors to consider. For one, an Olympic host city may receive substantial revenue from ticket sales, tourist spending, corporate sponsorship, and television rights. Cities such as Los Angeles (1984) actually made a large prot from the Games they hosted.

The wind controls our planet's weather and climate. But how much do we understand about this complex force (1)_____ can kill and spread fear? On the night of October 15, 1987, the south of England was struck by strong winds. Gusts of over 130 km/h (2)_____ through the region. Nineteen people were killed, £1.5-billion worth of damage was (3)_____ and 19 million trees were blown down in just a few hours. Although people thought of this as a hurricane, the winds of 1987 were only a (4)_____ 7 storm. They remain far better known than the much more serious storms of January 25, 1990, when most of Britain was hit by daytime winds of up to 173 km/h. On this occasion, 47 people were killed, even though, (5)______ in 1987, the weather forecasters issued accurate warnings.

Public Education in the United States, programs of instruction (1) _______ to children, adolescents, and adults in the United States through schools and colleges (2) _______ by state and local governments.

It does not offer a radical social message, but it does (5)______ reflect the sentiments of many who feel they are victims of an over-mechanized world.

Neil Armstrong (1) _______ into his microphone. And in less than two seconds the message that will live in the annals of exploration flew with the (2) _______ of radio to the huge telescope dish at Honeysuckle Creek, near Canberra, Australia, thence to the Comsat (3) _______ over the Pacific, then to the switching center at the Goddard Space Flight Center outside WashinGiải thíchon, D.C., and finally to Houston and the (4) _______ of the world: “That's one small step for a man, one giant leap for mankind.”

(2) _______ can read text, view pictures, watch animation, listen to sounds, and even explore interactive virtual environments on the Web.

Nowadays there is plenty of good (3) ________available for young children, and of course, seeing plenty of books in use about the house will also (4) ________them to read

Seaward of the continental shelves (3) _______ the Arctic Basin proper, which is subdivided (4) _______ a set of three parallel ridges and four basins (also (5) _______ as deeps)

These features were discovered and explored (1) _______ in the late 1940s. The Lomonosov Ridge, the major ridge, cuts the Arctic Basin (2) _______ in half, extending as a submarine bridge 1,800 km (1,100 mi) (3) _______ Siberia to the northwestern tip of Greenland. Parallel (4) _______ it are two shorter ridges: the Alpha Ridge on the North American (5) _______, defining the Canada and Makarov basins, (6) _______ the Arctic Mid-Ocean Ridge on the Eurasian side, (7) _______ the Nansen and Amundsen basins. The average (8) _______ of the Arctic Ocean is only 1,300 m (4,300 ft) (9) _______ the vast shallow expanses on the continental shelves. The deepest (10) _______ in the Arctic Ocean is 5,450 m (17,880 ft).

Parallel (4) _______ it are two shorter ridges: the Alpha Ridge on the North American (5) _______