---What’s wrong with you, Mr. Keller? --- I’ve had a very bad headache for two d
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---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
试题答案
B
解析:
略