Measures have to be taken to teach young people how to ______ themselves both in family and in school. They don’t know the basic manners. 
| A．do | B．perform | C．behave | D．work |
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Measures have to be taken to teach young people how to ______ themselves both in family and in school. They don’t know the basic manners.
| A．do | B．perform | C．behave | D．work |
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