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."

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

................. in UNESCO’s World Heritage Sites in 2003, Phong Nha Ke Bang is noted for its cave and grotto systems.

This morning I bought  ............ book and a pencil. The pen is in my bag, but I don’t know where ............. book is.

There is nothing more annoying than you are interrup when you are speaking.

Due to the latest fecast, the tunnel will be finished next year

To save to sthe California condor from extinction, a group federal, local, and privately organizations initiated a rescue program .

All employee will be given an electric for entrance and exit purpose

The attribution of human characteristics to animals or inanimate objects appears in the mythologies of many cultures is a literacy device called anthropomor

Tom didn’t believe us, and it took along time to convince him

Education is desperately needed in many countries where a high percentage of the  popula are illiterate

The National Basketball Association will not let any athlete to continue playing in league unless he submits voluntar to treatment for drug addict

In pools, goldfish are not just ornament; since they feed on mosquito larva, they are also benefit

I had a few problems, but Rob gave me some good advices

As you come to each town, however small, you will see a sign which states the name of the town and how many habit does it have

Individuals with chronic liver disease is gravely at risk for premature death, heart seizures, strokes as well as hypertension, jaund, and malnut

In 1984, the world popula rose to over 4.7 billion, up almost 85 million from an estimate made the year ago.

Halifax is largest city and chief port of Nova Scotia and is the eastern term of Canada’s two great railway systems.

Light travels from the Sun to the Earth in eight minuteand twenty seconds.

Because there was o evidence against himself, Slade was released

Before bridges werebuilt, all transport across major rivers in the area were by ferryboat.