Question

a. jolene was delighted when professor yancey returned her perfect calculus test with an ear-to-ear grin.
error? y or n
if error, revise:
b. scrubbing the shower with bleach and a brush, the mold stains began to fade.
error? y or n
if error, revise:
c. to finish by the 6pm deadline, the computer keys sang with mary todd’s flaming fingertips!
error? y or n
if error, revise: ______________________
d. jennifer watched steven stuff his mouth with cookies filled with chocolate frosting.
error? y or n
if error, revise: ______________________
e. perched on the wire, the bird watched bob the cat slink behind the barn.
error? y or n
if error, revise: ______________________
f. groaning on rusty springs, the trampoline tossed the kids like towels in a dryer.
error? y or n

Explanation:

Part a

The sentence has a misplaced modifier. The phrase "with an ear - to - ear grin" should modify Professor Yancey, but as written, it seems to modify the test.

The participial phrase "Scrubbing the shower with bleach and a brush" should modify the person doing the scrubbing, but the subject of the main clause is "the mold stains" which can't do the scrubbing.

The infinitive phrase "To finish by the 6pm deadline" should modify the person doing the action, but the subject of the main clause is "the computer keys" which can't finish the task.

Answer:

Error? Y
If error, revise: Jolene was delighted when Professor Yancey, with an ear - to - ear grin, returned her perfect calculus test.

Part b