Parallelism
The new policy aims (A) to reduce costs, improving efficiency, (B) and create (C) opportunities for collaboration (D).
Error: (B) improving → to improve
The series of lectures (A) on environmental issues (B) are scheduled (C) for next semester (D).
(C) are → is
By the time the professor arrived (A), the students (B) already completed (C) the experiment (D).
C. completed → had completed
Running quickly (A), the book (B) fell from his hands (C) as he entered the classroom (D).
(B) the book → he (dangling modifier)
The informations (A) in the document (B) were very helpful (C) for my research (D).
(A) informations → information
The students were asked (A) to write essays, preparing presentations, (B) and participate (C) in group discussions (D).
B. Prepare
Neither the teacher nor the students (A) was (B) interested in postponing the field trip (C) until next week (D).
(B) was → were
The company (A) has operated (B) in this region since (C) more than twenty years (D).
(C) since → for
The woman (A) served sandwiches to the children on paper plates (B).
Error: (B) on paper plates → rewrite for clarity (misplaced modifier: Were the children or sandwiches on paper plates?)
He is capable (A) to solve (B) complex mathematical problems (C) in just a few minutes (D).
(B) to solve → of solving
The CEO not only promised (A) higher salaries (B) but also to provide (C) better working conditions (D).
C. Provide (providing)
The committee (A), along with the advisors, (B) have decided (C) to cancel the meeting (D).
(C) have → has
If he studies (A) harder last year, (B) he would have passed (C) the entrance exam (D).
(A) studies → had studied
She speaks fluently (A) English (B) and French, (C) which makes her an asset (D).
Error: (A) fluently English → English fluently
Although he worked hardly (A) on the project, (B) he failed (C) to meet the deadline (D).
(A) hardly → hard
The training program emphasizes (A) learning communication skills, developing leadership qualities, (B) and how to manage conflict (C) in the workplace (D).
(C) how to manage conflict → managing conflict
Every one of the recommendations (A) in the report (B) require careful (C) consideration before being approved (D).
(C) require → requires
The scientist claimed (A) that the new material (B) was stronger than anything that existed (C) before it has been discovered (D).
(D) has been → had been
Covered with cream and fresh strawberries (A), everyone enjoyed (B) the delicious cake (C) at the party (D).
(B) everyone enjoyed → the guests enjoyed (dangling modifier)
The lecture was so bored (A) that many students (B) started checking their phones (C) halfway through the presentation (D).
(A) bored → boring
The research team focused on (A) collecting accurate data, analyzing the results carefully, (B) and to publish their findings (C) in a reputable journal (D).
(C) to publish → publishing
The effects of global warming (A) on marine life (B) is (C) becoming more evident each year (D).
(C) is → are
When the manager (A) will arrive (B) tomorrow, the staff (C) will present the report (D).
(B) will arrive → arrives
Walking down the street (A), the tall buildings (B) impressed the tourists (C) with their beauty (D).
(B) the tall buildings → the tourists
She made (A) a strong effort (B) to complete the assignment (C) despite of (D) being sick.
despite of → despite