Fill in the blanks using the most appropriate form of verb:
____________ a bicycle when you were a child?
a) Do you have
b) Did you have
c) Were you having
d) Had you have

Hint: Tense is a grammatical category of verbs used to express distinctions of time. There are three tenses - past, present, and future.

Complete answer:
In the given question, we have to find out which of the options includes a phrase in the simple past tense, as this tense is the tense used to describe something that happened in the past, formed by an inflection of a single word (i.e., without an auxiliary verb such as be or have).
Let us thus analyze the options given to us in this question and find out which one is in the simple past tense -
Option (a.), 'Do you have', refers to ‘do’ which is in the simple present tense.
Therefore, option (a.) is incorrect. We need simple past tense as this tense is the tense used to describe something that happened in the past (having a bicycle as a child).
Option (b.), ‘Did you have', refers to ‘did’ which is in simple past tense.
Therefore, option (b.) is correct, as this tense is the tense used to describe something that happened in the past (having a bicycle as a child).
Option (c.), ‘Were you having', refers to ‘having’ which is in the continuous tense.
Therefore, option (c.) is incorrect as we need simple past tense, as this tense is the tense used to describe something that happened in the past (having a bicycle as a child).
Option (d.), ‘Had you have', refers to ‘had’ which is in perfective tense.
Therefore, option (d.) is incorrect. We need simple past tense as this tense is the tense used to describe something that happened in the past (having a bicycle as a child).

Note:
In this question, it will be helpful for the student to recall the concept of a verb. A verb is a content word that denotes an action, occurrence, or state of existence. A verb is the word class that serves as the predicate of a sentence.