I did not realize that I had left my umbrella on the bus when it started to rain.

It is the large city in Europe with a population of over eight million.

Public health experts say the money one spends avoiding illness is less than the cost to be sick

There is the very real possibility that these animals could panic, frighten and would break away, should there be a sudden loud noise

John and Mary went to........... school yesterday and then studied in ........... library before returning home. 

Dinosaurs are traditionally classified as cold-blooded reptiles, but recent evidence based on eating habits, posture, and skeletal structural suggests some may have been warm-blooded.

James often goes swimming in the summer, _    ?

Genetic engineering is helping researchers unravel the mysteries of previously incurable diseases so that they can get to its root causes and find cures

.................. Mekong River is .............longest river in.................... Vietnam. 

That it is believed that most of the earthquakes in the word occur near the youngest mountain ranges – the Himalayas, the Andes, and the Sierra Nevada.

Look at.................. sun. It is rising. 

Dwelling primarily in the ice Northern Polar seas, beluga whales are characteristically small, white, agile, and elusive.

The panda's ...... habitat is the bamboo forest.

Southern California, is known for its mild winters, has become the new home for many senior citizens escaping the hard Northern winters.

The children can read the story, _    ?

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

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

“Gone With the Wind”, the epic novel about life in South during the Civil War period, took ten years write.

“I’m not staying any longer.” “I wish you ____.” 

Choose the correct answer to complete the sentence. "Humans now have to suffer the effects of global warming ______ having treated the environment irresponsibly"

Salt was once too scarce and precious that it was used as money.