题目

My brother practices ______ every Sunday.A. to swim B. swimming C. swims D. swim 答案：【答案】B【解析】句意：我的弟弟每周日练习游泳。A. to swim 游泳，动词不定式；B. swimming游泳，现在分词；C. swims游泳，第三人称单数；D. swim游泳，原形。短语practice doing sth.表示练习做某事。根据题意，故选B。．不等式组的整数解的个数是（　　）A．B．C．D．