Select the most appropriate option to improve the bold part of the sentence.
According to the teacher, the Earth is revolving.
Show answer & explanation
Correct answer: C
Explanation
Universal Truths: In English grammar, facts that are always true (universal truths or scientific facts) are typically expressed in the Simple Present Tense.
Verb Tense: While 'is revolving' is grammatically possible to describe an ongoing action, 'is round' or 'revolves' are the standard ways to state a permanent characteristic of the Earth in this context.
Elimination of other options:
'spoke that...': This is idiomatic error; we say 'said that' or 'spoke about.'
'said that the Earth is round': This would make the sentence redundant ('According to the teacher, the teacher said that...').
'told that Earth was round': 'Told' requires an object (e.g., told us), and using 'was' suggests the Earth is no longer round, which is incorrect for a universal truth.
Therefore, “The earth is round” is the correct answer.