活学巧用(用quiet,still,silent或calm填空) ⑤The family lived in a 　quiet     little town. ⑥The house was so 　silent     that no one dared to say a word. ⑦It was so 　still     that even the leaves on the trees were not moving. ⑧Keep 　calm     ,and try not to panic!

完成句子 ⑨Please　keep/stay calm     in the face of great danger. 面对巨大危险时请保持镇静。