1.“逗号不具有连接两个句子的作用”这是语法上规定的,B C排除 make为逗号前的句子的执行动作,主谓关系,所以用-ing A
2.be said to为固定短语 根据句意,应用现在完成时 A
3.语法上规定纸条上写着什么等等非谓语一律用-ing,D
4.what to do固定短语
5.see在定语从句中作了谓语,carry out不能再作谓语,只能作非谓语,还原定语从句They would like to see the plan that was carried out next year.plan是被人执行的,被动,用--ed
所以答案为C