China has got a good _____for fighting against the flu with its careful and smooth organization.
—Hey, taxi! —, sir? —Can you take me downtown?
—I don’t suppose Jimmy could have done well in the mid-term exam last week,______? --- ______ he almost failed in the exam.
It is strange that such a thing ______ in your school.
As is often pointed out, knowledge is a two-edged weapon which can be used ________ for good or evil.
Urban crowdedness would be greatly relieved if fares ________ on public transport were more reasonable.