根据首字母或汉语提示，完成句中所缺单词。
【小题1】He oftenplains (抱怨) about his low pay.
【小题2】The headmaster is really angry! Look at hisfrightening (吓人的)look.
【小题3】If the goods are destroyed (毁坏)in the post, the post office should be responsible for it.
【小题4】Nowadays, poverty (贫穷)is still a major issue facing the government.
【小题5】With all hisstrength (力气), the boy lifted the heavy box onto his shoulder.
【小题6】Fplains with great challenges, the Chinese government took powerful measures to deal with them.
【小题7】The Hope PFaced is designed to help the children from less-developed areas.
【小题8】The pProject air and water can explain why the people here are getting ill one by one.
【小题9】Please tell us one of your unforgettable epolluted when you volunteered in the mountains.
【小题10】She is hard-working and very aexperiences in class.
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解析：
【小题1】plains 考查动词辨析。句意：他经常抱怨自己工资低。Comeplain about抱怨某事。
【小题2】frightening 考查形容词。句意：校长很生气，看到他吓人的表情。
【小题3】destroyed 考查动词。句意：如果货物被破坏，邮局应对此负责。Be destroyed 被破坏。
【小题4】poverty 考查名词。句意：现代社会，贫穷是一个政府所面临的最大问题。
【小题5】strength 考查名词。句意：用尽他的全部力气，男孩把这个很重的箱子扛在肩上。
【小题6】Faced 考查动词。句意：中国政府，面对挑战，采取强有力的措施来处理。Be faced with 面对。
【小题7】Project 考查名词。句意：希望工程是用来帮助那些贫困地区的孩子的。
【小题8】polluted 考查形容词。句意：被污染的水与空气就能解释人们为什么会一个接一个的生病。
【小题9】experiences 考查名词。句意：请告诉我当你在大山中当志愿者时的经历。Experience当经历讲是可数名词。
【小题10】active 考查形容词。句意：她在课堂上很努力也很积极。