Answer:
12. failed to submit a task on time
13. feels unpleasant
The correct sentence is option two:
There have been many accidents during airshows; for example, last year the wind toppled a tent and equipment on top of bystanders.
The semicolon is a punctuation mark which indicates a pause, usually between two clauses that are not joined by a coordinating conjunction. Semicolons can also replace commas to separate elements in a list that already includes commas.
In the example sentence, the semicolon separates two clauses. Besides, a comma follows the introductory phrase "for example" because it introduces a clause.
Jane Eyre is a novel by English writer Charlotte Brontë. It was published on 16 October 1847, by Smith, Elder & Co. of London, England, under the pen name "Currer Bell
