As long as you are sure this plan works, you should ____ with it, whatever happens.

A．break up

B．be careful

C．go ahead

D．come up

现代化学课程发展的趋势是______。
①重视提高学生科学素养
②强调科学精神与人文精神结合
③运用多媒体展示实验过程
④倡导自主、合作探究的学习方式

A．①②③
B．②③④
C．①③④
D．①②④