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

No one is in this room now, _    ? 

Alike other forms of energy, natural gas may be used to heat homes, cook food, and even run automobiles

Each chemical element is characterized to the number of protons that an atom of that element contains, called it atomic number.

Don't leave here, _    ?

There is a rumour that the army is about taking power, though this has been denied by government sources.

There is nothing more annoying than you are interrupted when you are speaking

Visitors may realize that even though they can’t make their homes in Da Lat City, they can take away with them memories of their beauty

 “I’m too tired to study.” “If you hadn’t watched that late movie last night, you _____ so tired now.” 

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

If I were you, I will go to the dentist’s and have the tooth checked. 

Most bats roost in crevices, caves, or building by day and are active at night or twilight.

The ozone layer must be protected because it shields the Earth from excessive ultraviolet radiations

Medical research indicates that large amounts of Histamines can responsible for cold, high fever, and other respiratory reactions.

The bold way in which Margaret Mead defined the terms “family” – based as much on choice as on biological relationship – is possibly the most enduring of her legacies

Although ferns lack flowers, they do have leaves, stems, and root.

Choose the correct answer to complete the sentence. "We must _____ that people are heavily polluting the environment."

In the United States, the leading butter-producing states which are Wisconsin, California, and Minnesota.

Michael has worked in three different companies in three different positions, so he has more work experience than the other applicant’s

While searching for the wreckage of a unidentified aircraft, the Coast Guard encountered severe squalls at sea.

The environment can be defined as all living and nonliving items in an area at a specify time.

One responsibility of human beings is not to interfere with the actions of another people except in the face of injustice