题目

Her mother_________ having read the letter when Mary found the envelope open.A. thought B. considered C. admitted D. advised 答案：【答案】C【解析】考查动词辨析。句意：玛丽发现信封被打开时，她母亲承认读过那封信。A. thought认为； B. considered考虑；C. admitted承认；D. advised建议，根据题意，故选C。一本画册的原价是75元，现在按原价的七折出售，现价比原价便宜了______%，便宜______元．