Jiwen and Mabel,

Thanks for posting your answers to the questions about the article on romantic love. Here is a new version of your sentences with some changes in grammar and mechanics (spelling, punctuation):



1.Yes, we can. The chemical called Nerve Growth Factor(NGF) that  makes us romantic disappears over a year , so  romantic love last only a year. (No errors at all)

2. The name of the chemical is  Nerve Growth Factor (NGF). (This sentence also has no errors)

3. According to the story, romantic love lasts only a year. (1 error fixed)

4. 58 volunteers were in the study.  Some people were in love and other people were single. (1 error fixed)

5.No , the researchers didn't  compare the volunteers to  the other group.(2 errors fixed).

   The  researchers  compared NGF levels in this group with those in people who were single or in   steady relationships. (no errors at all)

6.When the NGF levels increase, people get sweaty palms and butterflies in the stomach. (2 errors)

Good work! Most of this is correct. Also, it shows you understood the article well.