So absorbed in his work ____________that not a sound ___________.

语知识运用的第一节：单项填空从A、B、C、D四个选项中，选出可以填入空白处的最佳选项。Baird invented _________ television,_________ invention that would later completely change people’s life.

Mr. Wang _____ gets up early. So he is ______ late for work.

Have you ever met Mr.Green

The discovery of gold in Cin