题目

 “I _______ a pretty good swimmer. I grew up in Hawaii,” Obama said, before adding with a smile, “I am a little bit out of practice.” A. used to be                         B. use to be C. used to being                       D. get used to being 答案：B下列计算正确的是（　　）A．-3×2=-6B．-3-3=0C．（-3）2=6D．-3+2=-5