After George had returned to his house, he was reading book

He gave up his job _    he earned much money.

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

Foreign students who are doing a decision about which school to attend  may not know exactly where choice are located.

Sawfish are shark-like fish have “saws” of cartilage set with two rows of teeth on snouts

Hardly he had entered the offic when he realized that he had forgotten wallet 

The completion of the bridge has been held ........... owing to a strike.

Some children, beforegoing school, go to kindergartens, officially are called nursery schools

Everyone knows about the pollution problems, but not many people have _____ any solutions. 

He never goes home before he will finish work.

Abraham Lincolns boyhood home resembled those of others midwestern pioneers, with its dirt floor, sleeping loft, and crude fireplace.

Pham Tuan said everything quite strange although he ……….. when he was on the ground.

Each year, people around world spending billions of dollars buying merchandise on the Internet

Let's go for a long walk, ______?

The patient who was not supposed to be released until the end of the week was told to dress in clothes and report to the nurses’ station.

In winter it is important for farmers to provide food and warm for  animals.

While the sun is the major source of ultraviolet rays, it is not source only

A pair of jeans _______ in the washing machine this morning.

Most people in cities should _____ cycling instead of using cars. 

Light can travel from the Sun to Earth in eight minute and twenty seconds.

All the staff in Tam’s film are expected to do some overtime, if need rises .