A plan has been put forward ________ more graduates should go to work in the country.

(2011·辽宁，32)When the news came ________ the war broke out，he decided，to serve in the army.

Modern science has given clear evidence ________ smoking can lead to many diseases.(2011·天津，13)

The notice came around two in the afternoon ________ the meeting would be postponed.(2012·江苏)

(2013·浙江，16)The only way to succeed at the highest level is to have total belief ________ you are better than anyone else on the sports field.

(2011·北京，31)The shocking news made me realize ________ terrible problems we would face.

________ a strange plant！I've never seen it before.(2011·辽宁，33)

It's the first time that he has been to Australia，________？

He must be helping the old man to water the flowers，________？

I told them not everybody could run as fast as you did，________？(2011·重庆)