For help with punctuating independent clauses joined by a coordinating conjunction, see pages 325-26 of A Writer's Guidebook.

NOTE: Cutting, pasting, and adding or deleting text may cause awkward line breaks which you can correct by backspacing. Exercise 29 Commas with independent clauses joined by coordinating conjunctions Insert commas where necessary in the following sentences. 1. The Chinese have attempted to modernize Lhasa but an ancient aura still pervades the city. The Chinese have attempted to modernize Lhasa but an ancient aura still pervades the city.   2. The Potala Palace, the "Palace of the Gods," dominates Lhasa and this immense eleven-story complex of buildings is where the Dalai Lama has traditionally lived. The Potala Palace, the "Palace of the Gods," dominates Lhasa and this immense eleven-story complex of buildings is where the Dalai Lama has traditionally lived.   3. Lhasa was founded in A.D. 400 as a fortress but after the Potala Palace was built, Lhasa became a religious center. Lhasa was founded in A.D. 400 as a fortress but after the Potala Palace was built, Lhasa became a religious center.   4. The Tibetans banned Europeans from this "Forbidden City" so many Europeans tried to enter the city illegally. The Tibetans banned Europeans from this "Forbidden City" so many Europeans tried to enter the city illegally.   5. The history of Lhasa is unsettled for the city has often been under the harsh military rule of the Chinese. The history of Lhasa is unsettled for the city has often been under the harsh military rule of the Chinese.   6. The ancient Mayans built an imposing pyramid in the Yucatan jungle of Mexico but that structure is not the only intriguing evidence of their civilization at Chichen Itza. The ancient Mayans built an imposing pyramid in the Yucatan jungle of Mexico but that structure is not the only intriguing evidence of their civilization at Chichen Itza.   7. Near the pyramid is a ball court with stone hoops set in its walls and from the intricate illustrations carved there, archaeologists have been able to learn more about the game. Near the pyramid is a ball court with stone hoops set in its walls and from the intricate illustrations carved there, archaeologists have been able to learn more about the game.   8. The players must have had a real incentive to win for the leader of the losing team was killed by his opponents. The players must have had a real incentive to win for the leader of the losing team was killed by his opponents.   9. Mayan builders created the structures at Chichen Itza after careful astronomical calculation and the designs of the buildings demonstrate the civilization's interest in solar and lunar positions. Mayan builders created the structures at Chichen Itza after careful astronomical calculation and the designs of the buildings demonstrate the civilization's interest in solar and lunar positions.   10. The ancient Mayans vacated Chichen Itza for reasons no longer known yet the Yucatan Peninsula's residents still include many of their descendants. The ancient Mayans vacated Chichen Itza for reasons no longer known yet the Yucatan Peninsula's residents still include many of their descendants.   Please fill out the fields below to ensure correct delivery of your exercise. You will receive a confirmation notice. Your e-mail address Your instructor's e-mail address Your name CAUTION: If you check your answers and go back to this page using the links on the answer key, your changes will be gone. Use the back button on your browser to keep the changes intact. E-mail exercise to instructor Student answer key for this exercise (even-numbered answers only) Instructor answer key for this exercise (password protected)

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