---- Tom, did Mr. Li join you in your discussion? ---- No, he _____, but he happened to have fallen ill.
Li Ming won the first prize in the English speech contest and I’m glad that his efforts at last ____.
Although the teacher did not mention any names, everybody knew who he was ____.
It ____ be our headmaster. He has gone to Beijing.
---Would you like to go to the concert with me, Mary?--- I have got no interest in it; ____, I have lots of homework to do.
Papermaking began in China and from here it ____ to North Africa and Europe.