However weak we are，we can still do something against the powerful nature so long as we are     prepared．

Although modem organic food has become very popular, many people can' t figure out the difference between organic foods and ______ grown foods．

The guide showed the travelers _____ of the factory.

Although I majored in English, language _______ became a challenge when I set foot in the USA for the first time.

(2014·安徽新余市模拟)Recently stock prices have been falling________because of the influence of the global financial crisis.