http://www.youtube.com/watch?v=Bnt4QtdQ6ac 0:44 this investigation become like whack-a-mole.
http://www.youtube.com/watch?v=AophM_Xu7jI 6:30 like whack-a-mole
参考リンク
http://www.youtube.com/watch?v=enmxcvdYEGc 2:01 it's where his father got whacked. ここでポールの父親が殺られたんだよ。
練習問題解答
b-2831 play whack-a-mole
b-5135 whack-a-mole situation