When people move to another country, they often try to the customs of their native land.A.

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A. turn on
B. bring up
(答案→)C. keep up
D. give up
解析：考查动词短语辨析。句意：当人们搬到另一个国家，他们经常会保持他们原有的风俗习惯。turn on打开；bring up吐出，养大；keep up保持；give up放弃。如：If we can keep up this speed，we should arrive there in about two days．如果我们能保持这个速度，我们在两天之内就应到达那里。故C正确。