Correct Answer:
D. don't
This question tests subject-verb agreement and the correct use of auxiliary verbs in a contrasting statement.
- The first part of the sentence, "John loves flying," uses the simple present tense. The contrasting clause needs to maintain this tense and reflect the plural subject "we."
- 'don't' is the correct auxiliary verb. It is the contraction of "do not," which is the appropriate negative auxiliary for the simple present tense when the subject is plural ("we"). So, "John loves flying, but we don't" is grammatically correct.
- 'doesn't' is the contraction of "does not," used with singular third-person subjects (he, she, it). It is incorrect with "we."
- 'aren't' is the contraction of "are not," used with the verb 'to be' (e.g., "we aren't flying"). It doesn't fit the context of "loving flying."
- 'hasn't' is the contraction of "has not," used in the present perfect tense (e.g., "he hasn't flown"). It is incorrect for the simple present tense and the subject "we."