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Phong nha cave is a world heritage site .The full name of that cave is Phong nha ke bang belong to Ke bang mountains in Quang Binh Phong Nha-Ke Bang area is noted for its cave and grotto systems as it is composed of 300 caves and grottos, of which only 20 have been surveyed by Vietnamese and British scientists; 17 of these are in located in the Phong Nha area and three in the Ke Bang area. Phong Nha holds several world cave records, as it has the longest underground river, as well as the largest caverns and passageways. The park derives it name from Phong Nha cave, the most beautiful of all, containing many fascinating rock formations, and Ke Bang forest. The plateau on which the park is situated is probably one of the finest and most distinctive examples of a complex karst landform in Southeast Asia. This national park was listed in UNESCO’s World Heritage Sites in 2003 for its geographical values as defined in its 

CHia động từ trong ngoặc vs các thì:

1. We didn't recognize him. He (change) has changed a lot.

2. Where did you (spent) spend your holiday last year?

3. He (do) had done nothing before he (see) saw me.

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A volunteer also benefits themselves because they get to see how their contribution has made a difference. This experience contributes to personal development especially in some areas such as self-fulfillment, self-confidence, and self-esteem which often flourish in the midst of volunteering experiences. The selfless act of volunteering also provides a spiritual enhancement. Knowing that you made a positive impact on someone is an emotionally uplifting experience that can never be matched by money or fame. Donating time now will also help in the future. Volunteering strengthens present skills and also shows an employer that an effort has been made to make an improvement. Such skills include communication skills, ability to work with others, ability to take direction and lead others, time management and dedication. Employers will realize that as a volunteer you must be able to prioritize your schedule so as to devote time for activities that benefit others. When employers see active volunteer work on a resume, they are much more likely to employ that person rather than someone who doesn’t do voluntary work. Employers know that most people who offer their time are conscientious, honest and hardworking individuals.

Bài làm 

\(24=\frac{1}{2}.x.10\Leftrightarrow24=5x\)

\(\Leftrightarrow x=\frac{24}{5}\)

. I prefer city life.................country life.

 A. Than B. Better than C. More than D. To. 

4. Do you mind if I................here?

 A. Sitting B. Sit C. To sit D. Sitting.

 5. Woud you mind if I................ a photo?

 A. Take B. Taking C. Took D. To take.

 6. The doctor................a red car is living around the corner. 

A. To drive B. Drove C. Driving D. Driven.

 7. Where will you stay if you................to paris? 

A. Go B. Went C. Gone D. To go. 

Em cũng thế :((

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