Fill each of the gap with the appropriate option from the list following the the gap.
The hospital was closed …… because there were no beds to put patients ….. ?
The correct answer is: B
Explanation
close off. : to not allow (something) to be used for a period of time,
''On'' is the correct preposition. In this context it means physically in contact with and supported by (a surface).
Example; "on the table was a water jug"