______, I lost heart in English learning, but my teacher often said to me, “Keep on working hard; you’ll succeed _______.”
A.At a time; in time
B.At a time; on time
C.At one time; in time
D.At one time; on time
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C解析试题分析：考查词组：at a time一次，at one time曾经，一度，in time及时，迟早，on time准时，句意：我曾经对英语学习灰心，但老师经常和我说：一直努力，你迟早会成功的。选C。考点：考查词组点评：英语中有很多同样的名词搭配不同的介词的短语，要注意辨别，做题时结合句意选用最恰当的一个。这题考查的是和time有关的词组。