Question

Ancient people could tell time by examining the sky. A handheld device called an astrolabe helped. Invented over 2,000 years ago, astrolabes consisted of two overlapping metal discs. The night sky was drawn on the discs. People turned the discs until the drawing matched the stars in the sky. Then they'd read markings around the edge for the time and location. People could track the moon to know when sunrise and sunset would occur.

Astrolabes were _________.

A mysterious
B tough
C useful
D enormous

Answer 1

Answer:

a and c is the answer

Explanation:

thank you

Answer 2

The answer to this question will be option C, useful. Thus, the complete sentence will be "Astrolabes were useful."

• An astrolabe is an ancient astronomical instrument that was a handheld model of the universe.
• This helped the people in ancient times for reckoning time or for observation purposes.
• Astrolabes were useful to the people. It helped them in reckoning time, a difficult task during the olden days before the advent of clocks.
• The word mysterious means something which is difficult or impossible to understand, explain, or identify.
• Here, the Astrolabe is not mysterious but rather well understood and invented by humans.
• Tough refers to something strong enough to withstand adverse conditions or rough handling.
• In the above paragraph, there is no mention of the Astrolabe's toughness. Hence, no conclusion can be reached at this point and we must consider this option to be incorrect.
• Something enormous is very large in size, quantity, or extent.
• Here, it is quite clearly mentioned that the Astrolabe was a handheld device. So, it can never be enormous.
• Thus, the answer to this question will be option C, useful.

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