—I’m sorry, sir. I’ve made lots of mistakes in the monthly exam.— Never mind. ___________, the exam is a bit difficult.
English is _________ international language.
—I wonder___ like to be an astronaut(宇航员).—I don’t know, but I imagine it’s exciting.
___ buy your ticket from a ticket machine. There are lots of people there.
I’m going to be late for work. There’re ___ buses on this route(线路).
Listen! The phone ___. Please go to answer it.