(2014·杭州一检)She paused________over the unfamiliar word but soon continued.

After two years' research，we now have a ________ better understanding of the disease.(2013·全国Ⅱ)

I wasn’t blaming anyone; I           said errors like this could be avoided.

Walt, feeling a bit tired, decided to stop off ______ in Hong Kong on the way to Singapore. 

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