Question: #15: "Arrived" and "was" are both simple past, so why not answer B? Why mix simple past with past perfect? #17: The verb of course must agree with the subject. But the subject is "None." "Infomation" is part of the prepositional phrase, and as such plays no role in determining verb tense. So, answer B is correct, but not for the stated reason. #23: Two correct choices: "Could you please not smoke here?" Or "I would appreciate it if you did not smoke here." The stated test answer would translate to "I would appreciate it if you were unable to smoke here," which was probably not the intent. #28,: Answer D also correct, simple past plural. #35: Answer D also? Future perfect continuous. #36: The expression here would be "had put in more effort." #38: Answer D also. #43: Answer A implies certainty. Answer C impies possibility. Answer D implies lesser liklihood. #44: Answer C also. Current failure to realize the significance of a past discovery or event. #47: Answer B also, simple past. So all three would be grammatically correct.
Question:
#15: "Arrived" and "was" are both simple past, so why not answer B?
Why mix simple past with past perfect?
#17: The verb of course must agree with the subject. But the subject
is "None." "Infomation" is part of the prepositional phrase,
and as such plays no role in determining verb tense. So,
answer B is correct, but not for the stated reason.
#23: Two correct choices:
"Could you please not smoke here?" Or
"I would appreciate it if you did not smoke here."
The stated test answer would translate to "I would
appreciate it if you were unable to smoke here," which was
probably not the intent.
#28,: Answer D also correct, simple past plural.
#35: Answer D also? Future perfect continuous.
#36: The expression here would be "had put in more effort."
#38: Answer D also.
#43: Answer A implies certainty.
Answer C impies possibility.
Answer D implies lesser liklihood.
#44: Answer C also. Current failure to realize the significance of a
past discovery or event.
#47: Answer B also, simple past.
So all three would be grammatically correct.