Mr Jackson hasn't decided this weekend.
A：where he will have a picnic
B：where will he have a picnic
C：where he had a picnic
D：where did he have a picnic
五四运动是一次彻底的反帝反封建的爱国运动，它留下了伟大的“五四”精神。下列口号中最能体现“反帝反封建”这一性质的是（ ）
