The pen I______I ________is on my desk, right under my nose.
A．think; lostB．thought; had lost
C．think; had lostD．thought; have lost
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(shí)，“筆丟失了”是在“thought”之前，所以用過去完成時(shí)。
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