单项选择题

A．however
B．if
C．while
D．even though
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单项选择题
A．necessaryB．vitalC．essentialD．basic
A．necessary
B．vital
C．essential
D．basic
单项选择题
A．emotional feelings areB．are emotional feelingsC．the emotional feeling isD．is the emotional feeling
A．emotional feelings are
B．are emotional feelings
C．the emotional feeling is
D．is the emotional feeling
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