The statement above is FALSE.
Homonyms refers to two or more words which have the same spelling, the same sound but different meaning. The three words given above, that is, Mary, Marry and Merry do not have the same spelling and sound, therefore, they are not homonyms.
1. The bones are being eaten by the dog
2. Was the car being sold by him?
3. The Holy Quran is read in the morning of everyday by us.
4. The chain is to be pulled by you.
5. My pen was being used by her.
6. They will be praised by him.
The idea that wearing space suits and putting them on is a delicate thing to do and is a step by step process requiring putting ear plugs in the ears before putting on the head cover and avoiding sharp objects so as not to puncture the suit and requiring walking gingerly once the suits are on.