班主任对班级日常管理所注意的问题主要是什么？
参考答案：
1.做好动员，明确任务
2.组织协调，相互配合
3.检查指导，反馈调节
4.调整计划，适时总结
My sister_______ the League last month and she has decided to _______ the activity to help the aged next week.
A．joined; join in
B．took part in; join
C．joined; attend
D．joined in; join in
多异氰酸酯
