Select the most appropriate option to fill in blank no. 1.
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. at.
- The sentence is providing a suggestion for how to fall asleep at night, so the preposition "at" accurately indicates the time of night when one should aim to fall asleep.
Therefore, the completed sentence is:
"In order to fall asleep at night, strive to turn off all electronic devices at least 30 minutes before getting into bed."