In which word does the letter ‘a’ have a different(不同的) sound?
A talk on Chinese history _____ in the school hall next week.
—Is Xiao Li in the classroom?—No, he there. I saw him in the reading room just now.
They arrived ___ London___ a cold winter night.
— Can you __________ another solution to the problem ?
______of the teachers in the school are from the famous colleges.