一道英文题帮忙解决，谢谢

来源：百度知道编辑：UC知道时间：2024/05/28 03:48:00

妈妈进来时，我正在给莉莉打电话。I was ----- ----- ----- ----- to Lily when my mother came in. 按照中文意思把英文补充完整。谢谢

I was on the phone talking to Lily when my mother came in.

making a phone call
因为是“正在”，所以make应该是进行时，make a phone call是固定短语，意为“打电话”

having a phone call

calling

having a phone call