Find mistakes and correct

Bats use echoes of their own high – frequency sounds detect food and avoiding obstacles

The invention of the Silicon chip in the 1960s revolutionized the computer industry

Research has proved that baby can distinguish its mother’s voice the moment he is born.

To be successful in an interview, you should control the feeling of pressure and make good impression on the interview

Why did all the customers at  the Red Lion have to  pay off pay off their beer that week?

Until recently, photocopy machines were regarded strict as business and professional office equipment that required a lot expensive service

Per capita income is a nation’s entire income dividing the number of people in the nation.

There are none young single people living in this town – only old people, young families.

The basic law addition, subtraction, multiplication and division are taught to all elementary school students

Those of us who (have a family history of heart disease should make year appointments with their doctors

The builders of the variety ancient cli ruins scattered throughout the canyons mesas of the arid Southwest of the United States are known as the cliff dwell

Many hundred years ago , there were many villages and little towns in (England.

Interestingly, the United States both produces or uses more crude oil than any other national

With cable broadband, you can go from one web page another much quickly than you can. With a dial-up modem or DSL, and you can lweb pages more readily.

The signing of the peace treaty was an event major importance.

Because the tachinid fly is a parasite of harmful insects, much  species have been imported from the United States to combat  insect pests.

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

Lewis and Clark had been gone for such long their expedition that many thought they were dead.

The boy who won the two medals ………. a friend of mine. 

If it will rain this afternoon, we will have to cancel (our picnic.

Chemical compound with Barium, Cobalt, and Strontium are responsible to many of the vivid colors fireworks.