单项选择题

Criticism without suggesting areas of improvement is not ______ and should be avoided if possible.

A．constructive
B．productive
C．descriptive
D．relative
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单项选择题
Since neither side was ready to ______ what was necessary for peace, hostility was resumed in 1980.
A．precede
B．recede
C．concede
D．intercede
单项选择题
Haven't I told you I don't want you keeping ______ with those awful riding-about bicycle boys
A．company
B．acquaintance
C．friends
D．place
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