Debra Kirk
Member
- Joined
- Jun 5, 2013
- Member Type
- Student or Learner
- Native Language
- English
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- United States
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- United States
Could someone let me know if I put the comma in the correct place in this sentence?
Upper endoscope is advanced through the esophagus, into the stomach, then through the pylorus into the duodenum.
Upper endoscope is advanced through the esophagus, into the stomach, then through the pylorus into the duodenum.