It is on 1st Sept. ________ students go back to school every year.

It was the hurricane ________ was called Sandy ________ left at least 10 people dead and hundreds of thousands without power on the eastern coast of America. 

Mr. Smith , in your eyes , ______that affects the development of China’s economy ?

It was because I was ill ________ I didn’t go to school.

---Do you know _______________________ won high click rate in micro-blogs?---It was the teachers’ wonderful chorus in the New Year’s gala.