---Isthatyourlibrary---Yes,andit'oldthing.A.aB.anC.theD./

Question

---Is that your library ---Yes,and it'___old thing.
A.a B.an C.the D./

Answer 1

---Is that your library
---Yes,and it's ___ old thing.
A.a B.an C.the D./
答案：B
解析：old 为元音音素,所以要用 an