Select the option that will improve the highlighted part of the given sentence.
The children opens the door silently, yesterday.

Correct option is C

The correct substitution of the highlighted part is (c) opened the door.
Explanation:
· The sentence mentions “yesterday”, which clearly indicates a past action.
· Therefore, the verb must be in the simple past tense to maintain correct tense usage.
· The verb "opens" is present tense, which creates a tense mismatch with "yesterday".
Grammatical Rule Used:
· For actions that occurred at a specific time in the past (e.g., yesterday, last night, in 2020), use simple past tense:
· ➤ Subject + V2 + object
· “Children” is plural, so no ‘s/es’ form of the verb is used in any tense.
Correct Sentence:
The children opened the door silently, yesterday.
Example:
· Incorrect: She eats dinner at 8 PM, yesterday.
· Correct: She ate dinner at 8 PM, yesterday.
Information Booster:
· Present simple tense cannot be used when the sentence refers to a specific past time.
· Helping verbs like “will” or “have” would change the tense and meaning unnecessarily.
Why Other Options Are Incorrect:
· (a) will open the door – future tense; doesn’t match the past time marker “yesterday”
· (b) open the door – simple present; still doesn’t match “yesterday”
· (d) will have opened the door – future perfect; not appropriate with past time reference