【简答题】

根据下列各句句意及所给首字母或汉语提示，在横线上写出单词的正确形式。
1 In the old days, many children suffered from h_____ because of no food.
2 If we rely firmly on the public, we will o_____all difficulties and reach our final goal.
3 The Yangtze River and The Yellow River r_____ the spirit of the Chinese people.
4 To get the advantage in the competition , you must have enough preparation in a_____.
5 It's too early to draw a c_____ that human beings can live on the Mars in the future.
6 In my eyes, you should never be _____ (满意的) with what you have achieved.
7 As we all know, metal _____ (变大；伸展) when they are heated to a certain degree.
8 He is _____ (好奇的) about any object he sees and he somehow tries to experiment it.
9 The society was set up to _____ (保留；保存) endangered species from dying out.
10 You can offer to answer questions and _____(向---挑战) yourself to speak more in public.