The sentence active is: I keep the mayonnaise in the refrigerator.
The sentence passive is: The mayonnaise is kept in the refrigerator (same thing as the question)
If the subject is performing the action, then the sentence is in an active voice. However, if the subject is simply receiving the action, then the sentence is in a passive voice. A helpful tip is to add "by zombies" after the verb. It helps a ton. If you can insert "by zombies" after the verb then it is passive.
The lesson shows the hardworking character of Mr Cavor and how determined he is to achieve the goals he wants to achieve.
<u>Explanation:</u>
First men in the moon talks about a character Mr Cavor who makes his own space ship because of his abilities, intelligence as he is a brilliant British scientist. In that takes a round to the space to the moon in his own created space ship.
In the travelling to the moon, he is also accompanied by two other men and they are all shown to be very hard working, determined and focused on their working.
He wanted one thing from his family: reconciliation.
A colon basically means "that is to say", try putting "that is to say" in place of the colon in each of the sentences. The only one that makes sense is the third example, "He wanted one thing from his family, that is to say, reconciliation".