Every individual _________ in a continually changing world of experience of which he or she is the center.
A．existsB．will existC．is existingD．has existed
A
本題考查時(shí)態(tài)。根據(jù)句意：每一個(gè)人都存在于一個(gè)以自我為中心、閱歷不斷變化的世界里�？芍靡话悻F(xiàn)在時(shí)，選A。
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