单项选择题

In order to prevent stress from being set up in the metal, expansion joints are fitted which ______ the stress by allowing the pipe to expand or contract freely.

A．relieve
B．reconcile
C．reclaim
D．rectify
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Professor Smith and Professor Brown will ______ in presenting the series of lectures on American literature.
A．alter
B．alternate
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The children like to ______ the new English teacher, who has a noticeable manner of walking.
A．take out
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