If drivers obeyed the speed limit, fewer accidents occur.

Visitors may realize that even though they can’t make their homes in Da Lat City, they can take away with them memories of their beauty

First raise your right hand, and then, you should repeat after me

A thunder usually follows lightning by five seconds for every mile between the flash and the observer.

If the world's tropical forests continue to disappear at their present rate, many animal species ____________ extinct. 

Did you read ............book I lent you ............ last week. 

A light year is the distance that light travels in one year calculated by using the speed of 186,284 miles the second as a base

There are some wild roses whose flowers smell sweetly.

There is the very real possibility that these animals could panic, frighten and would break away, should there be a sudden loud noise

The measurement known as a “food” has originally based on the size of the human food

.................. Mekong River is .............longest river in.................... Vietnam. 

Several comet are discovered each year, but very few of them are bright enough to be seen without the aid of magnification

In that age of computers, it is difficult to imagine how tedious the work of accountants and clerks must have been in the past.

We watch television after .................. dinner. 

Pictures of the surface of the planet Venus was received yesterday from the space probe “Explorer”, which was launched last year.

Migration of animals be initiated by physiological stimuli such as reproductive changes, external pressures such as weather changes, or a combination of either types of changes.

Choose the correct answer to complete the sentence. "Global warming occurs ______ the greenhouse gases in the atmosphere trapthe heat from the sun."

Chocolate is prepared by a complexity process of cleaning, blending and roasting cocoa beans, which must be ground and mixed with sugar.

Wealthy weapeople have always desired and wear precious stones because their beauty is lasting.

One responsibility of human beings is not to interfere with the actions of another people except in the face of injustice

The panda's ...... habitat is the bamboo forest.