It was . . . . . . . . very hot day. In fact, it was . . . . . . . . hottest day of the year. A. a, the B. a, a C. the, the D. a, an

The correct answer is: A. a, the

The first blank should be filled with “a” because it is a general statement about hot days. The second blank should be filled with “the” because it is a specific statement about the hottest day of the year.

Here is a more detailed explanation of each option:

• Option A: “a, the” is the correct answer because it is the only option that makes sense in both the first and second blanks. In the first blank, “a” is used to refer to hot days in general. In the second blank, “the” is used to refer to the specific hottest day of the year.
• Option B: “a, a” is not the correct answer because it is not grammatically correct to use two indefinite articles (a/an) in a row.
• Option C: “the, the” is not the correct answer because it is not grammatically correct to use two definite articles (the) in a row.
• Option D: “a, an” is not the correct answer because it is not grammatically correct to use an indefinite article (a/an) before a word that starts with a vowel sound.