1What caused the forest fire is a complete mystery. 2Do such a foolish thing means a waste of time and money. 3Faced with difficulties, we must try to overcome. 4We climbed the mountain, a panoramic view of the vast plains. 5Because he did not know how speed limit, drove fast. 6It was because he happened to meet with her in Beijing university, makes them again. 7Seize every opportunity, otherwise you will regret it. 8This evening I was in no mood to hear his boring jokes. 9Unfortunately, I have to drive home car BBS. 10He is the only survivor of the passengers in the accident. 11I think we can use computer suddenly to do the work. 12To some extent, cosmetics can make you look young forever. Therefore, eating a balanced diet and plenty of sleep is necessary.
麻烦采纳,谢谢!