Question

We have been studying_______ 7 am.
(a)since
(b)for
(c)to
(d)none​

Answer 1

Answer:

since is your answer good morning have a nice Day

Friendship is a relationship of mutual affection between people.[1] It is a stronger form of interpersonal bond than an association, and has been studied in academic fields such as communication, sociology, social psychology, anthropology, and philosophy. Various academic theories of friendship have been proposed, including social exchange theory, equity theory, relational dialectics, and attachment styles.

Answer 2

Answer:

We have been studying since 7a.m.