Please give me . . . . . . . . useful gift. A. a B. an C. the D. no article

Here are some more examples of how to use articles with countable nouns:

• I bought a new car.
• I have two dogs.
• I saw a bird in the tree.

In these examples, the articles “a,” “two,” and “a” are all necessary to specify which car, dogs, and bird the speaker is talking about.

However, in the original example, the speaker is not asking for a specific gift, so we do not need to use an article.