17.We are just _____ calling you up _____ you come in.A.abou
17.We are just _____ calling you up _____ you come in.A.about; when B.on the point of; while C.
不好意思,
17.We are just _____ calling you up _____ you come in.
A.about; when B.on the point of; while C.on the point of; when D.on the point of; as