Is it passive or active voice?

Many clothes (we're given) to the homeless shelter. Passive
By the end of today, the students (will have mastered) the grammar. Active
My aunt Margot ( has been traveling) with her daughter. Active
The cookies (have been eaten) by the guests. Passive
The test results (we're posted). Active

The last one is wrong. The test results weren't active.

You have a major spelling error!

The verb is WERE -- no apostrophe. The word you wrote is the contraction for WE ARE.

Sorry my iPad did that by itself

To determine whether a sentence is in active or passive voice, we need to examine the subject and the verb in the sentence.

Active voice: In an active voice sentence, the subject performs the action expressed by the verb.

Passive voice: In a passive voice sentence, the subject receives the action expressed by the verb.

Let's analyze each sentence:

1. Many clothes were given to the homeless shelter.
In this sentence, the subject "many clothes" is receiving the action "were given," which indicates that it is in passive voice.

2. By the end of today, the students will have mastered the grammar.
In this sentence, the subject "the students" is performing the action "will have mastered," indicating it is in active voice.

3. My aunt Margot has been traveling with her daughter.
In this sentence, the subject "my aunt Margot" is performing the action "has been traveling," indicating it is in active voice.

4. The cookies have been eaten by the guests.
In this sentence, the subject "the cookies" is receiving the action "have been eaten," indicating it is in passive voice.

5. The test results were posted.
In this sentence, the subject "the test results" is receiving the action "were posted," indicating it is in passive voice.