The next thing he san was smoke _____form behind the house.

In the past month, cruel snowstorms hit some European countries and America ,    great transportation problems in these countries.

In order not to be disturbed ,I spent three days ________ in my study.  

A terrible earthquake struck Wenchuan, Sichuan Province on May 12th,_____more than 60,000 deaths.

The new student was very slow to __________ the unusual rules of the school.