Choose the option that best completes the gap in the sentence. How many eggs were _____ by the hen?

The correct option to complete the sentence "How many eggs were _____ by the hen?" is laid.

Here's the explanation:

The word "laid" is the past participle form of the verb "lay," which means to put something down in a flat position or make it sit somewhere. Hens lay eggs, and when we use the past participle in a passive voice construction ("were _____ by"), we need to use "laid" to indicate the action completed by the hen.

Let's briefly consider why the other options are not suitable:

• lain: This is the past participle form of the verb "lie," which means to recline or be in a horizontal position. It is not used for placing objects like eggs.
• layed: This is not a correct form of the verb "lay." It is a common misspelling.
• laying: This is the present participle form of the verb "lay." However, in this sentence's context, we need the past participle to indicate the past action done by the hen, which is "laid."

Therefore, the accurate and grammatically correct answer is "laid."