I am having trouble understanding active and passive voice. Could you please help me with the following:
1. The material has been tested by our engineers, and they like it.
( The first clause is passive; the second clause is active, am I right?)
2. Your machine has been repaired, and it will be returned to you today.
(Both clauses are in passive voice?)
3. Which one contains active voice?
The supervisor announced the new work schedule. (I am thinking this is the correct one.)
The compositions were corrected by the teacher.
The patient's c-ray was read by the radiologist.
Too many mistakes were found in this document.
I read the indirect writing style is called passive voice, which means the subject received the verb's action. A direct writting style is called active voice, which means the subject does the verb's action. This to me is confusing, but I'll keep on until I get it in my head. Please let me know if I am correct in the previous 3 questions.

Thanks for all of your help.