A:had gone; must have turned
B:went; must tur
C:have gone; would have turned
D:went; should have turned
不等式3x+1<﹣2的解集是____.
①提前进入社会,参与工作,做好准备
②增强关心社会,热爱祖国的情感
③提高观察问题、分析问题和解决问题的能力
④了解社会,了解世界,增长知识