We have . . . . . . . . exam tomorrow. A. a B. an C. the D. no article

The correct answer is D. no article.

The word “exam” is a non-count noun, which means it does not have a plural form. It also does not have a definite article (the) or an indefinite article (a or an).

Here are some examples of non-count nouns:

• water
• air
• sand
• love
• happiness

As you can see, these nouns do not have a plural form. They also do not have a definite article (the) or an indefinite article (a or an).

When we talk about a specific exam, we can use the definite article (the). For example, we can say “I have the exam tomorrow.”

However, when we talk about exams in general, we do not use any article. For example, we can say “We have exams tomorrow.”

I hope this helps!