It is reported that of this week the price will have risen by about 10%．
A. by the end
B. at the end
C. in the end
D. at an end
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(答案→)A. by the end
B. at the end
C. in the end
D. at an end
解析：考查固定词组。By the endof到…末为止；at the end of在…的结尾；in the end最后，终于；an an end结束；句意：据报道到本星期结束的时候，这个价格将已经上涨了百分之10.故A正确。