______ the extreme levels of air pollution, city authorities have started to take measures to quickly reduce pollution levels and protect city dwellers.

Robert failed to seek a job for his poor education, though he is _______ to get one to support his family.

I think of life as a good book．The further you get into it, the more it begins to _____.

China has recently ______ its waters controls near the Diaoyu Islands to prevent Chinese fishing boats from ______ in the East China Sea．

 I can’t _________ his rudeness anymore, so we began to quarrel.