Inventing by Roger Bacon, the magnifying glass led to the creation of other scientific tools which have produced immeasurable scientific progress.

The composer Verdi has written the opera Aida to celebrate the opening of the Suez Canal, but the opera was not performed until 1871 

This time last year, I was cycling under the rain along a country road in France with a friend of mine

Ozone is an unstable faintly bluish gas that is the most chemical active form of Oxygen.

The British national anthem, calling “God Save the Queen”, was a traditional song in the 18th century.

The extraordinary beautiful of orchids makes them the basis of a multimillion-dollar floral industry .

No one is better at English than Lan, _    ?

In human beings, as in other mammal, hairs around the eyes, in ears and in the nose prevent dust, insects, and other matters from entering these organs.

Playing for the national team for the first time was an forgot experience for Hong Son

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

The homes created by the legendary architect Frank Lloyd Wright are still viewed as uniquely innovative, and valuable.

The number of time he spends gardening is increasing every day.

Due to the government’s policy, some farming are as have been abandoned

If people stop destroying animal's natural habitat, more species will survive and produce .......

James often goes swimming in the summer, _    ?

The bold way in which Margaret Mead defined the terms “family” – based as much on choice as on biological relationship – is possibly the most enduring of her legacies

You don't love me anymore, _    ?

The American anarchist Emma Goldman infused her spirited lectures, publishes, and demonstrations with a passionate belief in the freedom of the individual.

Because the diamond is the hardest naturally occurring substance, it is used in industry for to cut, grinding, and boring other hard materials.

You frequently see this kind of violence on .................. television. 

Choose the correct answer to complete the sentence. "Global warming occurs when the greenhouse gases in the atmosphere trapthe heat_______ the sun"