Smoking does great harm to our health. ( ) is smoking allowed in public places.

A．In no time

B．At a time

C．At all times

D．At no time

五四运动的直接动机目标是（）。

A、要求释放被捕学生

B、为举行全国群众游行运动做准备

C、要求帝国主义归还青岛

D、拒绝在巴黎合约上签字