This is _________orange. That's_________pen. A.a ,a B. an;a C.a;an
—Can the new railway station ____ as planned?—Sure, it completed in time, we’ll work two more hours a day.
—May I ask you one more question, Mr. Smith? —Sure, ______!
— Zhejiang University is very famous in the world.— Yes, _____ the students in Zhejiang University are from foreign countries.
—I hear a foreigner will come to our school. Do you know him ?—Yes, Edward, university student from Europe, will teach us art in his spare time.
— Do you think it will be cool tomorrow? — ________. It has been too hot for a week.