Write the past simple or present perfect from of the very in parentheses into the blank space.Do Not use contractions 've gone didn't know etc Last night l (lose) my apartment keys. I had to phone my roommate to let me in.

Last night I lost my apartment keys. I had to phone my roommate to let me in.

The verb in parentheses is "lose". We need to choose between the past simple or present perfect form of the verb to fill in the blank space.

To decide which form to use, we need to look at the context. The sentence talks about something that happened specifically last night, so we should use the past simple form of the verb.

In the past simple, we add "-ed" to regular verbs to form the past tense. However, "lose" is an irregular verb and its past tense form is "lost".

Therefore, the correct answer is "lost".