一位年轻太太， 这家饭店的一个客人， 正在一间凹室里弹钢琴，使他感到很愉快。
A young lady, a guest of the house, playing a piano in an alcove pleased him.
我正在家弹钢琴，我朋友敲了门。他进了屋，坐下喝了杯茶，就走了。
I was playing the piano, when my friend knocked the door. He came in and had a cup of tea, then he leaved.
我正在家弹钢琴，我朋友敲了门。他进了屋，坐下喝了杯茶，就走了。
I was playing the piano, when my friend knocked the door. He came in and had a cup of tea, then he leaved.
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