题目

 When you are absorbed in a book or simply trying to rest, the phone always seems to be       ringing, destroying _________ peace you might have.     A. whatever          B. however          C. no matter what      D. no matter how 答案：A如图所示，下面判断正确的是（ ）A．A－B＞0 B．A－B＜0 C．A－B＝0 D．B－A＞0