There is ______ desk in the room. _______ old book is on it.A. a; A B. a; an C. an; an
—How can we protect ourselves ________ the earthquake? —We should stay calm first.
Da Shan is _________ at Chinese. He can speak Chinese very _________.
—My mother has been ill for several days. —____________
He hardly goes to school by car, _________ he?
—Is this_________ bike? —No, it’s Lily’s. _________ is over there.