题目

She wanted me to phone a number in Zagreb to find out if her husband, who ____ to Yugoslavia for an operation on his liver just before the war, was alive or dead.   A.would go                     B.has gone                    C.went                                D.had gone 答案：D选修4-5：不等式选讲（1）求不等式|x-3|-2|x-1|≥-1的解集；（2）已知a，b∈R+，a+b=1，求证：(a+1a)2+(b+1b)2≥252．