It could take 4-6 months before the first batch(批)of vaccines (疫苗)are available to fight A/H1N1 flu ________ as swine flu, WHO officials said.
Steven didn’t follow the advice ______ by the villager and thus got lost in the forest.
The old man tried to save more money ______ he could contribute some to the flood victims.
The manager suggested the workers’ pay ______ by 10 percent.
The spokesman said that the poor safety standards were ______ for last Sunday’s accident.
It was ______ that caused her to serve dinner an hour later than usual.