Before dinosaurs became xtinct, plant life is very different on Earth.

You may choose one from the five World Heritage Sites in Viet Nam ____ in this leaflet to visit on your next field trip.

Choose the correct answer. " _____ more help, I could call my friend"

Choose the correct answer to complete the sentence. "_____ we had chosen a destination for our holiday, we began preparing for the trip."

She promised that she would come, but in fact he dosn’t.

Lara goes to a ........  temple every week.

She never says anything good about me. She is forever running me ..............

Choose the letter A, B, C or D to complete the sentences. "The electrical appliances you buy should ____   eco-friendly."

Conservation organizations help for preserve the ecology of an area by keeping track of endangered species.

Compact discs, which appeared on the market in the early 1980s, produce soun better quality than those of Standard phonograph records.

Stars derive their energy from monuclear reactions that take place in their heat interiors

There is nothing   .......  than going swimming in hot weather.

No decision will be made about my future appointment until all suit candidates had been interviewed.

Because of it consists only of relatively short strand of DNA protected by a shell of Protein, a virus cannot eat or reproduce by itself.

Some birds can trave speeds approaching one hundred miles an hour, and a few land animals can so 

Few people realize that the musician of the national anthem of the United States originally belonged to the British drink song

Frank Lloyd Wright has been acclaimed by coll as the greater (of all modern architects.

Price of homes are as high in urban areas that most young people cannot afford to buy them.

It _______ if nobody reminded them 

Neither I nor she_______ seen the film before. 

There is the very realpossibility that these animals could pani, frighten and would break away, should there a sudden loud noise.