Answer :
The correct word to fill in the blank is option C: 'flush'.
Here's why:
Meaning and Context: In the context of using toilets, 'flush' is the correct verb as it refers to the act of causing water to flow through and clean the toilet bowl.
Grammar: The sentence suggests a habitual action where students use the toilets but do not perform the action of cleaning them by using the flushing mechanism. The verb form should match this habitual action, which 'flush' does.
Comparison of Options:
- Option A: 'flash' - This means to shine brightly and quickly, which doesn't fit the context of toilet usage.
- Option B: 'flashe' - This isn't a standard word in English.
- Option C: 'flush' - Correctly describes the intended action in this context.
- Option D: 'flashed' - This is the past tense of 'flash', not appropriate here.
Therefore, the sentence would be: 'In most of the halls in the universities, students use the toilets and fail to flush them.'
Understanding words and their correct usage in context is crucial for effective communication and writing.
