A scrub jay can remember when it cacheda particular piece of food in a particular place, researchers have discovered,and tend not to bother to recover a perishable treat if stored longenough to have rotted. A. tend not to bother torecover a perishable treat if B. they tend not to botherrecovering a perishable treat C. tending not to botherrecovering a perishable treat if D. tends not tobother recovering a perishable treat E. tends not bothering to recover aperishable treat if
答案是D,谁能告诉我E错在哪里?谢谢!
|