---Do you know what presents they will buy for our teachers on Teachers' Day?---No, they keep the secret to __________.
Xi’an is one of ______capital _____in China .
Reading aloud is the best way English.
I left my keys in the room yesterday. I had to get ______the window.
—How often does the train run to Jinan ? —_____twenty minutes.
—Would you like some milk?—Yes, but just .