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

选B。句意为：我以为已丢了的钢笔却在我的桌子上，就在眼皮底下。thought 是过去时，“笔丢失了”是在“thought”之前，所以用过去完成时。