Fill in blank with the most appropriate Phrasal Verb from the options given below :

I set my alarm clock because I have to ________ early tomorrow.

get up

The most appropriate phrasal verb to fill in the blank is get up.

The phrasal verb get up means to leave bed. It is used to describe the act of waking up and starting the day.

The other options are not as suitable. Catch up means to reach the same level as someone else. Fill up means to make something full. Stand up means to move from a sitting or lying position to an upright position.