some questions

Hi. Could you please have a look at my answers? 

6. Choose the option that best completes the following sentence. Three essential components of a correct comparison between two or more items are _____________ .

Answers:
• pertinence, relativity, and parallel structure
• completeness, logic, and parallel structure
• relativity, logic, and pertinence

11. Choose the option that best completes the following sentence. In the sentence "To know him is to love him," the phrase "to know him" is ___________ .

Answers:
• the subject of the sentence
• an infinitive phrase acting as a noun
• the predicate of this sentence
• a and b

12. Choose the option that corrects the parallelism error contained in the following sentence. Greta is either moving to Germany next month or she will stay in Iceland for another year.

Answers:
• Greta is either moving to Germany next month or staying in Iceland for another year.
• Either Greta is moving to Germany next month, or she is staying in Iceland for another year.
• Either Greta will move to Germany next month or staying in Iceland for another year.
• a and b
• b and c

13. Choose the series of verbs that best completes the following passage. Sally's chronic carelessness _______ her in the hospital again. This time she _______ run over by a tractor as she _______ peacefully in a wheat field.

Answers:
• landed, had been, was snoozing
• has landed, was, snoozed
• is landing, has been, snoozed
• has landed, was, was snoozing
(but I am not quite sure about this answer, I also think about the first one)

14. Choose the option that best completes the following sentence. The general rule in grammar is to place modifiers _____________ .

Answers:
• as close as possible to the beginning of the sentence
• immediately before the words they modify
• as close as possible to the words they modify
• immediately after the words they modify

15. Identify the sentence that is written in active voice.

Answers:
• When I loaned my bike to Thomas, it was red; when Thomas returned the bike to me, it had inexplicably been painted yellow by him.
• A note had been written in the snow by the stranded skiers, but no one saw it in time.
• The waiter cleared our plates before we had even finished dessert.
• The artist's use of vibrant colours was always remarked upon by the art critics.

Many thanks