Fill in the blanks in this panicked college student's text messages to a friend before a big exam.

I finally started studying for this biology exam exactly ten minutes ago. I have been staring at the exact same page of my textbook for an hour without reading a single word. Honestly, I haven't felt this unprepared since my freshman year!

I finally started studying for this biology exam exactly ten minutes ago.

Use ago after a time expression to show how far in the past something happened. It pairs with the simple past tense ("started").

I have been staring at the exact same page of my textbook for an hour...

Use for to express a length or duration of time (an hour).

Honestly, I haven't felt this unprepared since my freshman year!

Use since to point to a specific moment or period in the past when something began (my freshman year).