i want to know about preposition

At, by, Before The flight stops at London. I met him at seven O'clock The car was going at 6 O'clock He is at fault Donald sold his bike at a loss We will reach his house by 9 O'clock My sister traveled by air The project was done by David I learnt ..

George wants to know the favorite brand of jeans of his classmates. Which of these questions will help him to know what he wants? => What type of jeans you wear the most? or What is the color of your jeans? or Which brand of jeans you like the most? Brand-X o..

Harry wanted to know which dish was most popular among his classmates. Which of the following questions can he ask them? => Do you cook? or Which is your favorite restaurant? or Which is your favorite dish? or Do you like eating pizza?..

Pat wants to know the favorite brand of gym shoes of his classmates. Which of these questions will help him learn what he wants? => Which brand of gym shoes you like the most: Nike or Reebok? or What is your favorite brand of gym shoes? or What is your shoe size? or Wh..

Joe wishes to know the favorite season of his classmates. He asked them if they like summer, spring or autumn. Is his question good enough to know what he wants? => no, he must include winter or yes, because most students like summer or yes, because he is giving three ..

Deborah wishes to know the favorite time of day of her classmates. She asked them if they like morning time or afternoon. Is her question good enough to know what she wants? => yes, because most students like morning time or yes, because she is giving two different cho..

Olga wishes to know the time when her classmates go to sleep. She asked them if they go to sleep by 11 P.M. Is her question good enough to know what she wants? => No, because she should ask if they like to play in the morning or in the evening time. or Yes, because mos..

Maria wants to know the favorite color of grade 3 students. Which question do you think Maria should ask to get the data? => Do you prefer your school uniform to be of green color or white? or Do you like your dress color? or What is your favorite subject? or What is your favori..

Jennifer wants to know the favorite pet of her classmates. Which of these is a fair question to ask? => Which is your favorite pet: a dog or a cat? or What is your favorite pet? or What is your favorite animal? or Do you like a bird or an animal as your pet?..

Jennifer wants to know the favorite outdoor game of her classmates. Which of these is a fair question to ask? => What is your favorite sport? or What is your favorite outdoor game? or Do you like chess or carom? or Which is your favorite outdoor game, football or tennis?..