---Mum, have you seen my pen? I can't find it. --- Is it ______ orange one? I put it in your school bag just now.
A.a B.an C.the D./正确答案B
---Mum, have you seen my pen? I can't find it. --- Is it ______ orange one? I put it in your school bag just now.
A.a B.an C.the D./正确答案B
