After an earthquake,a snake robot could help look for people under buildings.中为什么用could,而不can?

After an earthquake,what could a snack robot to do? After an earthquake,a robot can look for people trapping under buildings. 英语riddleWhat do you get if you milk a cow after an earthquake? after the earthquake 英语作文 the earthquake came a day after an even stronger quake hit the area.(the earthquake came a day) after an even stronger quake hit the area.是这么断句么?后面是after连词引导的时间状语从句? After an earthquake,a snake robot could help look for people under buildings.中为什么用could,而不can? _____(英雄)appeard onr after another after the big earthquake. After an earthquake,this kind of i_____can help look for people under the buildings.this kind of后加单数还是复数 9.How to protect yourself when you are in and after an earthquake?英语作文哈,八九句话就够了 英语翻译The death toll unrevealed is holding at 75 people after an earthquake shook Christchurch,leaving much of the city of $250,000 in ruins. How to safe when an earthquake happens 我们能预防地震的发生吗英文翻译can we----an earthquake---can we --- an earthquake --- --- there is an earthquake happening in Yushu还是there is an earthquake happened in Yushu? Luckily,there were still many people________(live)after the earthquake. After the terrible earthquake,hundreds of people were -(home) Many c____ have helped China after Wenchuan earthquake. After the earthquake,the whole city lay in r______. many people ----------- after the earthquake(leave)地震过后许多人无家可归