Question

5. To keep warm on cold nights I sleep ______ three ______
A) under / blankets
B) inside / blankets
C) through / blanket
D) in / blanket
E) outside / blanket's

Answer 1

To keep warm on cold nights I sleep under three blankets. The answer to this question is the first option.

The preposition under is used to signify the location of the subject in relation to the object.

The plural form of blanket is used because the number mentioned prior to that is three.