---Why is the classroom so dirty? --- Sorry, sir. It ______ yesterday. We forgot to do it.
__________players will take part in the Youth Olympic Game this year.
Mrs. Bond is a good teacher, he is also an old friend of __________.
Look! A large group of birds are flying __________the mountain!
It’s important for us to keep food __________in the fridge, especially in summer.
-We have 7 people here , but the car only has 5 seats. -I think we need to solve this __________now.