Meaning: 'From' means starting at a particular point in time, indicating the origin of the date.

Wrong options:

• to: The preposition 'to' indicates a direction or endpoint, which does not fit the context of dating something.
• of: The preposition 'of' indicates possession or belonging, which is not suitable for indicating a time reference.
• by: The preposition 'by' suggests a deadline or limit, which does not correctly convey the idea of dating something.

Correct answer: What

Explanation: The word 'What' introduces a clause that seeks to identify or specify something, making it suitable for the context of asking about the remarkable features of the house. It fits grammatically as a subject of the clause.

Meaning: 'What' is used to ask for information about something, in this case, the remarkable aspects of the house.

Wrong options:

• Which: The word 'Which' is used to specify among options, but here it does not fit as it implies a choice rather than a description.
• Where: The word 'Where' indicates a location, which is irrelevant in this context as we are discussing characteristics, not places.
• Why: The word 'Why' seeks a reason, which does not align with the intent of identifying remarkable features.

Correct answer: showing

Explanation: The gerund 'showing' functions as a present participle that describes the ongoing action of the tables, fitting grammatically and contextually as it indicates what the tables are doing.

Meaning: 'Showing' means to display or present information, in this case, the astronomical calculations.

Wrong options:

• showed: The past tense 'showed' does not fit here as it implies a completed action rather than a current state.
• shown: The past participle 'shown' requires an auxiliary verb to function correctly, which is not present in this structure.
• show: The base form 'show' does not fit grammatically as it does not agree with the structure of the sentence.

Correct answer: than

Explanation: The word 'than' is used for making comparisons, which is appropriate here as it contrasts the previous understanding with the new information about Mayan society's knowledge of astronomy.

Meaning: 'Than' is used in comparisons to indicate a difference between two things, in this case, the previous thought and the new evidence.

Wrong options:

• there: The word 'there' indicates a place or existence, which does not fit the comparative context of the sentence.
• that: The word 'that' is used to introduce a clause but does not serve the comparative function needed here.
• then: The word 'then' refers to a time sequence, which is not relevant in this comparative context.

Correct answer: each

Explanation: The word 'each' refers to individual items within a group, making it suitable here as it emphasizes the distinct roles of the gods in the lunar cycle, fitting grammatically and contextually.

Meaning: 'Each' means every one of two or more considered separately, highlighting the individual roles of the gods.

Wrong options:

• every: The word 'every' implies all members of a group collectively, which does not emphasize individuality as 'each' does.
• most: The word 'most' indicates the majority, which does not accurately reflect the individual nature of the gods' roles.
• all: The word 'all' refers to the totality of a group, lacking the individual focus that 'each' provides.