It was after the invention of printing to publish large numbers of books and pic
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It was after the invention of printing ________ to publish large numbers of books and pictures．
[]A．were people able
B．that people were able
C．when were people able
D．people were able
试题答案
答案：B
解析：强调句型；强调部分是after the invention of printing后面接连词that以及句子的其他部分。正是在印刷术发明之后人类才能大量地出版图书。