The passer-by jumped into the cold water to save the _____ boy, who cried for help, but it was too late and the boy was _______ at last.

Whether ways will be found to stop pullution or not is just ________ worries the public

Aprofessor from _______university said that he would think out _______unusual way to face the serious problem .

In China today women ___ 40% of the workforce, and nearly half of the others with children are in paid work.

It has been said that in no country ____Britain can one experience four seasons in the course of a single day.