Question 27: The hike / be / much / exhaust / we / expect /.
We need to form a sentence using these cues, likely involving a comparison. The word "much" suggests a degree of exhaustion.
A. The hike was much exhausting as we expected it to be. - This is grammatically incorrect. We don't use "much" directly before an adjective in this comparative structure.
B. The hike was much more exhausted as we expected it to be. - "Exhausted" describes a person's feeling, not the hike itself. Also, the "as...as" structure would be more appropriate if we used "as exhausting as".
C. The hike was much more exhausting than we expected it to be. - "Exhausting" correctly describes the hike. "Much more exhausting than" is the correct comparative structure.
D. The hike was much exhausted than we expected it to be. - This is grammatically incorrect. We need "more" with "much" for the comparative.
Therefore, the correct answer for Question 27 is C.
Question 28: I / listen / music / my headphones on / so / not hear / anything.
We need to form a sentence indicating that the speaker was listening to music with headphones and therefore didn't hear anything.
A. I am listening to music and my headphones on so I didn't hear anything. - The tense is inconsistent ("am listening" and "didn't hear"). Also, "and my headphones on" is not grammatically correct.
B. I was listening to music with my headphones on so I not hear anything. - "Not hear" should be "did not hear" or "didn't hear".
C. I listened to music without my headphones on so I didn't hear anything. - This contradicts the cue "my headphones on".
D. I was listening to music with my headphones on so I didn't hear anything. - This sentence correctly uses the past continuous tense for the action of listening, indicates the use of headphones with "with my headphones on", and uses "so" to show consequence, followed by the correct past simple negative "didn't hear anything".
Therefore, the correct answer for Question 28 is D.