70-20=____
70-40=____
70-50=____
70-70=____
古语“漫卷诗书喜欲狂”“怒发冲冠”“哀民生之多艰”“风声鹤唳,草木皆兵”分别表达了哪些情绪( )
听第三段对话,回答两个问题。
The team will move a speed of 15 kilometers per hour, and have a short break every 2 hours. During the break they will tell stories_______ English.