—Sorry, I forgot to bring your book.— Never mind. I won’t use it today.
Are you going to __________ this challenge?(挑战)
The boy looks nice ________ white and the red sweater looks good ________ the girl.
We just need one of you for the game.________you _______your brother can join us.
--- Cross the road carefully, __________ you’ll keep yourself safe. --- Thank you.
---Why do you like yellow? --- Because it always reminds me __________ a warm, sunny day.