Question

 The pen I       I       is on my desk, right under my nose.

  A. think; lost       B. thought; had lost

  C. think; had lost    D. thought; have lost

Answer 1

選B。句意為：我以為已丟了的鋼筆卻在我的桌子上，就在眼皮底下。thought 是過去時，“筆丟失了”是在“thought”之前，所以用過去完成時。