What is the appropriate description to the below sentence?
Your machine has been repaired, and it will be returned to you today.
a. Both clauses are in active voice.
b. Both clauses are in passive voice.
c. The first clause is active; the second clause is passive.
d. The first clause is passive; the second clause is active.

Hello

The answer would be choice b.  Although one is past tense and the
other is future tense, both are passive.

"Most English verbs have two voices, the Active and the Passive. Learn
the difference between these two, noting carefully that this is not a
matter of tense (present, past, or future) but deals with the question
of whether or not the subject is the source or the recipient of the
action in the verb."
http://www.mala.bc.ca/~johnstoi/grammar/passives.htm

[Tense ]
 [Passive voice form ]
 
Present 
 it is cleaned 
 
Past 
 it was cleaned 
 
Future 
 it will be cleaned 
 
Present perfect 
 it has been cleaned 
 
Past perfect 
 it had been cleaned 
 
Future perfect 
 it will have been cleaned 

http://64.233.161.104/search?q=cache:5QhoFD59x1sJ:www.english.uiuc.edu/cws/wworkshop/grammar/active_and_passive_voice.htm+grammar+passive+%22has+been&hl=en

Thanks again for letting us help.
Richard-ga

Thank you,