_____, it was very difficult, but about an hour later it became easier.
[ ]
A. In the end B. At the end C. At the beginning D. In the beginning
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◎ 相似题
与“_____, it was very difficult, but about an hour later it became easier.[ ]A. In the end B. At the endC. At the beginning D. In the beginning”考查相似的试题有：
