单选题 An enlarged prostate may ______ the bladder and pinch off the urethra, causing pain and difficulty with urination.
A. collaborate B. compress C. bother D. boil

【正确答案】 B
【答案解析】[解析] B项“compress压缩”符合题意。其他三项“A项collaborate合作，通敌；C项bother打扰；D项boil煮沸”都不正确。本题空格处是说前列腺增大会挤压膀胱。因此B项为正确答案。