Here are the answers to your questions based on grammar and clarity:
QUESTION 7
Heublein, a Hartford, Connecticut-based company, is moving to another state.
Correct
(This sentence is grammatically correct.)
QUESTION 8
In Twain's novel racism provides unique symbolism.
Correct
(This sentence is also grammatically correct as it has proper structure and punctuation.)
QUESTION 9
With sweat pouring down his face the point-guard, stepped up to the free-throw line.
Incorrect
(This sentence is incorrect because there is an unnecessary comma after “point-guard.” It should either read "the point guard stepped up" or have a comma after "face" instead of after "point-guard.")
QUESTION 10
For most the year is already finished.
Incorrect
(This sentence is incorrect because it is missing a comma before "the year.” It should read, "For most, the year is already finished.")
Let me know if you need further assistance!