Question

we really enjoyed -----on the trip to manali last month.(us/ourselves)

Answer 1

✔✔ Answer ✔✔

Question ✏ we really enjoyed -----on the trip to manali last month.

Answer ✏ We really enjoyed $\textbf{\huge{\red{Ourselves}}}$ on the trip to manali last month.

Answer 2

We really enjoyed ourselves last month.

Ourselves is known as the first person plural reflexive pronoun.

A speaker uses ourselves to refer to people in general. When the subject refers to the same people the word Ourselves used as the object of a verb or preposition. It is also used to give emphasis on the first person plural subject.  

When the speaker says something like  'We did it ourselves', it indicates that something was done by the speaker and a particular group of other people. In the above sentence, it is indicating that the speaker and the group of people enjoyed rather than anyone else.