What a surprise!Last Sunday was my mother's birthday. We wanted to give her a surprise, so we didin't mention anything about the birthday celebration all along and she thought we had forgotten her big day. On Sunday morning she went to do the shopping as usual. After she left, we quickly decorated the living room for the birthday party. Before my mother was back, everything was ready. When she opened the door, in one voice we said "Happy birthday".

"What a surprise!"

My mother responded with joy.

in one voice 可用together代替