－How did you find those days.
－The days________we spent together on the farm are not easy________．

Such exchange students________have a good knowledge of English will not worry about their daily life in America.

Visitors are deeply attracted by the 10，000­square­meter skiing park，________is among the biggest in Asia.

In an economy ________income per head used to rise by barely 1% a year, current growth rates feel like a miracle.

The days are gone________you can breathe fresh，unpolluted air or drink clean, unpolluted water in the countryside.

Soon children in the camp had many new friends, ________they shared food, stories and projects.

(2013·高考江西卷)He wrote a letter________he explained what had happened in the accident.

(2013·高考四川卷)Nowadays people are more concerned about the environment________they live.

(2013·高考湖南卷)Happiness and success often come to those________are good at recognizing their own strengths.

(2013·高考安徽卷)Mo Yan was awarded the Nobel Prize for Literature in 2012，________ made one of the Chinese people’s long­held dreams come true.