A、seldom B、rarely C、often D、occasionally C

Tornadoes swept through northern Bangladesh, killing at least 55 people, injuring hundreds and blowing way thousands of flimsy huts, officials said on Thursday.
   The twisters hit nearly two dozen farming villages in the neighboring districts of Netrokona and Mymensingh on Wednesday night.
   Most people were home after celebrating Pahela Baishakh, the Bengali New Year’s Day, which features colorful parades and fairs.
   At least 35 people, including children, were killed and nearly 700 injured in Netrokona, 80 miles north of the capital, Dhaka, officials said. At least 20 others were confirmed dead in Mymensingh, said rural council member Delwar Hossain. Thousands were left homeless and spent the night in open fields, witnesses said.
   Rescue workers said the death toll could rise because dozens of people were missing and close to 1,000 hurt, many of them seriously.
   Eight bodies were found in the rubble of twisted tin roofs and trees in Mymensingh after a tornado swept through five farming villages in the region, said Delwar Hossain, a rural council member.  Four others died in the hospital and at least 100 were injured.
   Reporters at the scene said almost nothing was left standing along the path of the funnel cloud.
   Bangladesh, a delta nation of 140 million people, is often buffeted by tropical storms.