单项选择题

I purposely ______ from extending these observations to any length.

[A] abstain
[B] sustain
[C] retain
[D] detain

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单项选择题

Some day those pictures will be ______ more than all you have in your shop.

[A] worthy
[B] worth
[C] worthwhile
[D] worthless

单项选择题

His maturity appears in the ______ clear-sightedness with which he could observe his own character.

[A] indifferent
[B] unconcerned
[C] detached
[D] incurious

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