Question

The first class of the day was scheduled at........
And..9.a:m​

Answer 1

The first class of the day was scheduled at 9 a:m​

Explanation:

Incomplete sentence:

The first class of the day was scheduled ----- 9 a:m​

Prepositions are used to describe the relation  between words and sentences.

Prepositions are preceding a noun, pronoun and other elements in a clause.

Preposition "at" is used to describe a location or time at which something is going to happen.

The first class of the day was scheduled at 9 a:m​