In the 1800’s botani Asa Gray worked to describe and classifying the plants foundn North America.

Of the much factors that contributed to the growth of international tourism in the 1950’s, one of most important was the advent of jeted travel in 1958.

Keep trying to learn English. Don’t give up. Eventuall, you will succeed, even though you may not know how much time it cost

According to lassical musical tradition, the term “sonata” is given to those works are written solo piano or for solo wind or string instrument.

The ozone layer must be protected because it shields the Earth from excessive raviolet radiations .

Both Mr. and Mrs. Smith are explaining the children the rules of the game

Jobs which are highly paid in some countries are badly paid other.

Pigeons, like many migratory birds, read he positions of the Sun and stars in order orient them.

Both Ann and her sister look like her mother.

The police officer lectured the children for ten minutes about the dangers to throw stones, but then them off with a warning.

I work in a large office with about thirty other people, most of who know quite well omenough.

Most babies will grow up be as clever as their parents.

The leader emphasized the need for justice and equality between his people 

We chose to take a trip to the Far East (because it was advertise adventurous and intrigued .

To his surprise , the engine started by the very first try

The rock formations in the Valley in Nevada has been worn into many strange shapes by the action of wind and water

Mary and her sister just bought two new winters coats at the clea sale.

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

Carol is wearing a new dress and Helen loves it.
- Helen: “_______”
- Carol: “Thanks. I’m glad you like it. My sister give it to me yesterday.”

The average temperature on Mars  the fourth planet from the Sun, is eighty degree than colder on Earth

The 22nd SEA Games consisted of athletes from eleven __________ countries.