Thank you ________ helping me when I have some problems ________ my English.
—_________ model plane is this?—I think it’s Jim’s. Look, his name is on it.
If you _________ your name on the paper, you can get a magazine.
—Which country is the Great Wall in?—It’s in __________.
—Please don’t throw paper on the ground. —_________, I won’t.
Li Yuchun is my favourite singer. I once met her _________ 2012 in Hunan.