— Come and join us, Betty!— I’m afraid I can’t. I’m too busy now. If I ______ time, I will certainly go.A. have B. have had C. will have D. had 答案:A两个小朋友玩“石头、剪刀、布”的游戏:一个人出“石头”,另一个人可能出(_____);一个人出“剪刀”,另一个人可能出(_____);一个人出“布”,另一个人可能出(_____);共有(_____)种可能出现的结果。