—Tom, you look tired this morning. What’s wrong?—I was so busy that I didn’t go to bed _____ 12 o’clock last night.
Mr Wang teaches _________ English in this school.
Which vowel is different?
---Can I have _____cakes, please? ---Sorry, I don’t have _____cakes.
My brother often _______ e-mails to his pen friends.
How many classes _______ every Monday morning?