Let us go to a restaurant and have . . . . . . . . Coffee. A. a B. an C. the D. no article

The correct answer is D. no article.

The reason is that “coffee” is a non-count noun. Non-count nouns are nouns that cannot be counted. They do not have a plural form, and they are not preceded by an article.

For example, you would not say “I have two coffees” or “I saw a coffee”. You would say “I have coffee” or “I saw coffee”.

Other examples of non-count nouns include water, milk, rice, and sand.

In the sentence “Let us go to a restaurant and have coffee”, the word “coffee” is a non-count noun. Therefore, it is not preceded by an article.