下列变化属于物理变化的是 [ ]
A．CO使人中毒
B．澄清石灰水长期露置在空气中
C．干冰变为二氧化碳气体
D．二氧化碳的水溶液使紫色石蕊试液变红
答案：C
The teacher gave us some good ______ on how to learn English well.
A．advise
B．advises
C．advices
D．advice
When the clock __________ twelve o’clock, Cinderella suddenly remembered her godmother’s words and rushed away from the prince.
A．struck
B．beat
C．alarmed
D．settled
