useful invention(发明) the computer is!
—The Hang-chang high-speed railway(高铁) ____ in 2015.—Really? That’s news to me.
—May I smoke here,please?—I am afraid you .This is a non-smoking area.
. The moonlight goes _____ the window and makes the room bright.
Neither of the shoes are right. They are _______too big _____too small
Please help _______to the dishes, boys and girls.