—What do you think of the lesson?—This is _____ interesting lesson and it is also _____ useful one.A. an; an B. an; a C. an; the
-Do you know who took the students to the art and science fair ? -Well, Mr. Smith ____ .
—Tom, I lost my purse this morning. All my money is in it. —_______. Let me help you find it.
He tired his best to find a proper roommate to _______.
—Sally, which dress do you like best? —Oh, I’ve tried several ones on, but _______ of them fit me well.
.Our country _______ rapidly in recent years, but it is still a _______ country.