Choose the correct answer to complete the sentence. "______ in Thanh Hoa Province, the Citadel of the Ho Dynasty was added to UNESCO's World Heritage List in 2011."

A number of the Pacific Islands are volcanoes that have pushed up fromthe ocean floor, the others are the tops sunken mountainous ranges.

Choose the letter A, B, C or D to complete the sentences. "We should replace fossil fuels ____________ other renewable fuels such as water, sun, etc."

Carrie Chapman Call organized League of Women Votes after successfully campaign for the constitutional amendment that gave women the right to vote

Genetic engineering is helping researchers unravel the mysteries of previously incurable diseases so that they can get to its root causes and cures.

Many scientists contributed to the development of television, whether no one can be to have invented it.

Mary speaks English very  ............

Mutualism is a lationship between animal species which in both benefit.

The international Red Cross, which has helped so many nations, won the Nobel Peace Prize three times for their efforts to human suffering 

The world’s rain forests are being cut down at rate 3000 acres per hour.

Though he did not develop sign language, Laurent Clerc brought on America from France

Nylon, a synthetic done from a combine of  water, air and by product a coal , was first introduced in 1938.

Before the Industrial Revolution come to America, the vast majority of the population had lived in rur area

Lightning rods are used for to direct intense electri bursts into the ground instead of nto buildings and people

Choose the correct answer to each of the following questions. "My Son Sanctuary is a large complex of religious relics comprising more ______ 70 architectural works such as towers, temples, and tombs."

Some of us have to study their lessons more carefully if we expect to pass examination.

Salt was too scarce and precious that it was used as money .

There are many different ways of comparingeconomy of one nation with those of another.

The mayor and the council, meeting at the city hall as usual, they not dis the proposed new sports complex as planned.

Despite of rain or snow, there are always more than fifty thousand fans at the OS football games.

Mark the letter A, B, C, or D to indicate the word that differs from the other three in the position of primary stress in each of the following questions.