Learners can feel very ...... if an exercise is too difficult.

The dentist gave me a check-up and then telling me I needed two teeth.

............. winter is usually cold, but .................. winter of this year is warm. 

Short-wave radios that can receive and transmit signals are used by pilots, the police, and amateur operator .

Although usual living on or under rocks or on coral reefs, marine snails have been observed in a great various of habitats

No matter what different, various music types have one thing in common: touching the hearts of the listeners.

It’s a lovely old house, I agree, but can we afford to moderning it?

It was Vitus Bering, the Danish sea captain, who discovered Alaska on its voyage to Russia in 1741.

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

One of the four underlined parts marked A, B, C, D in each sentence is not correct in standard English. Identify them: 

If she bought that house now, she ran out of money. 

AIDS can be transmitted by practicing unsafe sex and receive tainted blood from one who is already infected.

If the water level has raised a little higher, the dam would probably have broken

Many small houses and huts were washed away when the river bursted its banks

During his speech in Congress, the President stressed the importance of good education for the well-being of generation to come

Several comet are discovered each year, but very few of them are bright enough to be seen without the aid of magnification

Choose the correct answer to complete the sentence. "Land erosion is mainly caused by widespread _______"

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

The number 8.5 is an example of a “mixed number” because it is composing of an integer and a fraction.

Intelligence , education, and experience all helps to shape management style

Many heavy work that was once done by hand can now be done more easily with the help of compressed air.

Jessamyn West’s first and most famous novel, the friendly persuasion, describes the life of the Quaker farmed family in the mid-1800’s.