When on holidays, the railways put on _______trains to make people’s travel more convenient.
Yesterday she sold her car, __________ she bought a month ago.
—Jim lived very close to the college when he was in New York.— __________ he seldom was late for class.
Japan says its Prime Minister promised to provide the world with "maximum transparency" about __________ accident at the Fukushima nuclear power plant during __________ telephone call.
Using many symbols makes _______ to put much information on a single map
__________ medical science has achieved control over several dangerous diseases, what worries us is that some of them are returning.