Parents are advised to take pressure their chileren and give them some encouragement before an exam.
A. off
B. over
C. from
D. to
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(答案→)A. off
B. over
C. from
D. to
解析：句意，父母们被建议，在考试之前，要给孩子减压并且给他们一些鼓励。take off 从……中去掉take over 接管 take from 取自 take to 适应，根据题意，故选A。