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 ..... ?
A
again / upon
B
off / on
C
down / at
D
up / in
Verified Correct Answer: B.
Grammar & Contextual 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"
Source: Myschool Past Questions Archive (Record #11072)