— What a beautiful birthday cake!—Yes, it’s ________ my mom. I received it this morning.
—It’s sunny today. How about going riding?— ________
—I’m poor at Maths. So I’m sad all day.—________. If you work hard, you will learn it well.
Mr Wu is standing _________ the classroom. There is a teacher’s desk_________ him.
—__________ he________ late for school this morning?—Yes, I think so.
A car _____ the tree last night.