问题
Half of surveyedin 16 countries say they go first to their closet friend to share their deepestwishes and darkest fears
A:in front; at the back
B:at front; at the back
C:in front; in back
D:at the front; at the back
B:at front; at the back
C:in front; in back
D:at the front; at the back
正确答案是：
