一天，汤姆正在看电视，妈妈回来了。
我进来时，汤姆正在看电视。
汤姆正在看电视，不是吗？
当汤姆的兄弟在打游戏时，他正在看电视。
Tom was watching TV while his brother was playing computer games.
她转向汤姆，而他正在看电视。
汤姆的爸爸正在读书，他的妈妈在看电视。
Tom's father is reading a book, and his mother is watching TV.
汤姆的爸爸正在读书，他的妈妈在看电视。
Tom's father is reading a book, and his mother is watching TV.
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