No one responded when Tom was speaking, so he paused _______ before continuing to draw our attention.

 –Have you finished your experiment report, Jane?--Oh, my god! I’ve _______ forgotten all about that.

 He said it was _____ impossible to buy the novel which was _____ worth reading.

It is well known to all that a machine needs fuel to run;    ,man needs food to live on.

Tom was caught cheating in an important exam. _____, he lost a golden chance of taking part in this competition.