Question

Fill in the blank with the correct form of the verb to complete the sentence.

People ______ think that the earth was flat.

• A. might
• B. used to
• C. could
• D. will

Answer 1

Answer: (B)

used to

Option B is the correct answer because 'used to' is used when we refer to things in the past which are no longer true. It can refer to repeated actions or to a state or situation, as in this case, people thought that the earth was flat before but they don't think so anymore.

Option A and D are incorrect because might and will are used in the future tense.

Option C is incorrect because 'could' is the past tense of can which means people were probably capable of thinking that the earth was flat which is incorrect.