Do you think he is lazy？” “I so once, but I don’t now.”A. may have thoughtB. can have tho

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(答案→)A. may have thought
B. can have thought
C. may think
D. might think
解析：考查虚拟语气。句意：你认为他懒吗？我过去可能这样想，但是现在不这样想了。“may+have+done”表示对发生过的事情的推测，意思是“可能已经”或“也许已经”，用于肯定句中。故选A。