问题补充:
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
答案:
A. think; lost
(答案→)B. thought; had lost
C. think; had lost
D. thought; have lost
解析:think发生在过去,用一般过去时;lose发生在think之前,用过去完成时。