单项选择题
A.They are both to blame. B.They are both easy to please. C.They can manage to get along. D.They will make peace in time.
A.It may change the existing social structure. B.It may pose a threat to their economic status. C.It may lead to social instability in the country. D.It may place a great strain on the state budget.
A.which B.but C.unless D.since