Fill in the blank with the most appropriate option.
The university has been closed ______ yesterday.

Correct option is D

The correct option to fill in the blank is (d) since.
Explanation: “Since” is used to refer to a specific point in time (yesterday) when the action started and continues till now.
Example: He has lived here since 2018.
Why other options are incorrect:
· (a) to: Incorrect in time expressions.
· (b) from: Would require “to” (from X to Y).
· (c) for: Requires duration, not point in time.
�� Information Booster: Use “since” for a specific point in time, and “for” for a period/duration.