卧底特工去了那所房子，明知那可能是个陷阱。

The undercover agents went to the house knowing that it might be a ___trap.

她太聪明了，不会掉入做任何无偿工作的陷阱。

She's too clever to fall into the ___trap of doing any unpaid work.

通过这个陷阱，马普尔小姐揭示了奎珀医生的真实动机，并让警察逮捕了他。

With this ___trap Miss Marple reveals Dr. Quimper's real motive and has him arrested by the police.