Check 18500 sentences (mostly fairly short) for sense and grammar. You are only required to judge whether they are correct English and make sense or not, no need to make corrections.
"The car swerve to the left at the intersection"
should be identified as wrong and deleted,
"I'll probably run across you at the meeting"
is OK and should be kept.
Native English speakers only. You need to check each one carefully; this project has already been done once but there are still quite a lot of errors. Anything that's not something a native English person would write should go.
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I am a published author. I also have taken several English classes in college and have a 4.0 (A) average in all of them. My native language is English, so I am very well qualified for this position.