We had . . . . . . . . very good weather while we were on holiday. A. a B. an C. the D. no article

The correct answer is D. no article.

The word “weather” is a non-count noun, which means it cannot be pluralized or used with a determiner (a, an, the). In this sentence, “weather” is the subject of the sentence, so it does not need an article.

Here are some other examples of non-count nouns:

• water
• air
• sand
• rice
• money
• information

Note that some non-count nouns can be used with a determiner when they are used in a specific sense. For example, you can say “I like the weather in California” or “I need some water.” In these cases, the determiner is used to identify a particular type of weather or water.