Having misplaced his keys, _________
Which choice completes the text so that it conforms to the conventions of Standard English?
the door could not be opened by the frustrated homeowner.
the frustrated homeowner could not open the door.
opening the door was impossible for the frustrated homeowner.
it was impossible for the frustrated homeowner to open the door.
Correct Answer: B
Choice B is the best answer. The introductory phrase "Having misplaced his keys" describes an action performed by a person. "The frustrated homeowner" is the correct subject.
Choice A is incorrect because "the door" did not misplace the keys. Choice C is incorrect because "opening the door" did not misplace the keys. Choice D is incorrect because "it" did not misplace the keys.