A scrub jay can remember when it cached a particular piece of food in a particular place, researchers have discovered, and tend not to bother to recover a perishable treat if stored long enough to have rotted.
A tend not to bother to recover a perishable treat if
B they tend not to bother recovering a perishable treat
C tending not to bother recovering a perishable treat if
D tends not to bother recovering a perishable treat(正解)
E tends not bothering to recover a perishable treat if
不懂d和e为什么要选择d而不是e呢
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