---What’s wrong with you Mr. Keller?- I’ve had a very bad headache for two days. At fi

问题补充：

---What’s wrong with you, Mr. Keller?

--- I’ve had a very bad headache for two days. At first, I I caught a cold, but the medicine .

A. thought, hasn’t worked

B. had thought, didn’t work

C. thought, hadn’t worked

D. have thought, hasn’t worked

答案：

A. thought, hasn’t worked

(答案→)B. had thought, didn’t work

C. thought, hadn’t worked

D. have thought, hasn’t worked

解析：本题考查时态。根据句意可知我原以为我得感冒了，故用过去完成时，药没起作用为过去的事实，故用一般过去时。句意：——Keller先生，你怎么啦？——我头疼两天了。起初，我原以为我患感冒了，但服药没有效。