I__upset when i failed in the exam.

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I__upset when i failed in the exam.
A be B used to was C use to be D used tobe
回答时候请回答为什么谢谢

C 首先A是原型,排除.B的格式不正确,used to 后面要用动词原型的；后面的when i failed in the exam是过去式,因此主句要表达出“过去···”的意思.use to do sth正好可以表达这层意思

I__upset when i failed in the exam. 14.I ______ upset when I failed the exam. I'm very furstrated when I heard that I had failed the exam. ----,he still failed in the exam i failed the exam 同义句改写 He failed in the exam,and I wonder ___ he studied hard in th -I tired many times,but i still failed in the exam 初中英语32.---- I 've tried my best but i failed in the exam aga I failed in the exam again,and the d____ look on my father's I failed in the find exam last termand only then_--- the imp ---I failed in the exam.---_________.Try to do better next t I‘m sorry to hear that you failed in the exam