-- Is there ______ umbrella on the desk?-- Yes, there is. It’s blue umbrella.A. an; a B. an; / C. the; a
—Could you tell me____? —Sorry,I have no idea.
—The problem is too difficult,can you show me _____,Wang Le? —Sure.
—What do you think of Ann? —Ann is so careful that she always goes over her exercises to ______ there are no mistakes.
—_____will your sister be back ? —In about two hours.
—Please don’t touch that fish.It smells _______. —OK,I won’t.