9.

Answer and Explanation

Your Answer is

Correct Answer is B

Explanation

Item B: According to the tense of the context, the underlined part of We might...we could... should be the past tense of the modal verb, indicating the virtual, and item B is correct.

Item A/D: The sentence lacks a subject and a predicate, the underlined part should be the subject-predicate of the sentence, A/D is wrong.