单项选择题

Such crimes may be so complex that months or years go by before anyone ______ them.

[A] discovered
[B] will discover
[C] would have discovered
[D] discovers
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单项选择题
Dogs are often praised for their ______; they almost never abandon their masters.
[A] faith
[B] loyalty
[C] trust
[D] truthfulness
单项选择题
These people once had fame and fortune; now ______ is left to them is utter poverty.
[A] all that
[B] all what
[C] all which
[D] that all
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