And Widow Maker,in the end, caused the biggest problem for Pecos Bill.

VOA: special.2009.11.28

What do you think is the biggest problem about living in LA?

你觉得住在洛杉矶最大的问题是什么？

大众交通枢纽 - SpeakingMax英语口语达人

But the biggest problem was the civil war in China.

VOA: special.2010.07.23

Analysts say the biggest problem is high unemployment, which weakens demand and makes banks reluctant to lend.

VOA: standard.2009.12.20

"When we ask them what is the biggest problem in the local areas we find that security takes a back seat and issues like electricity, roads,water,and unemployment come up on top,"

VOA: standard.2009.10.27

"And the biggest problem that we heard from our economists with regard to why employers are not hiring, it is all the job-killing policies that are being offered by this administration and this Congress,".

VOA: standard.2009.12.29

In areas where fighting has been most fierce between the Taliban and U.S.-led NATO forces Afghans say attacks, violence and terrorism are identified as the country's biggest problem.

VOA: standard.2009.10.27