根据下列句子及所给的首字母，写出各的正确形式（每空限填一词）。 小题1:As we all know, Nelson Mandela was once s_______________ to 27 years in prison. 小题2:On the top of the high mountain, they found the air was hard to b____________. 小题3:He is not a Chinese but he can speak Chinese f_____________. 小题4:Most scientists present at the meeting voted a_____________ the plan for it would be harmful to the air. 小题5:They all b__________ out laughing at the funny joke. 小题6:She is so generous that she gives the poor food and clothing and asks for nothing in r________. 小题7:After the earthquake, the whole city lay in r__________. 小题8:A majority of people like to play o__________ rather than stay indoors when it is fine. 小题9:People in all countries hope for a p_____________ world instead of one filled with wars. 小题10:We need more e___________ to prove that he is the thief.