根据下列各句句意和空白之后的汉语提示词，在横线上写出对应单词的正确、完整形式，每空只写一词。
【小题1】The snow storm was the worst natural disaster (灾难) to hit the city.
【小题2】Mary is a stubborn girl that no one can persuade (劝服，劝说) her to do anything.
【小题3】She never forgets the important papers so she is very reliable (可信赖的，可靠的).
【小题4】The shopping center was in ruins (废墟，毁灭) after the big fire.
【小题5】The eastern (东方的) sky was just turning pink.
【小题6】Unluckily, they were trapped (使陷入困境) in the river.
【小题7】David watched the bus until it disappeared gradually (逐渐地).
【小题8】He wants to be a reporter (记者) when he leaves university.
【小题9】Many countries are suffering (遭受，经历) from air pollution now.
【小题10】Some animals choose to live in caves (洞穴) to protect themselves.
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解析：
【小题1】disaster 名词灾难：disaster.
【小题2】persuade 动词说服;persuade
【小题3】reliable 形容词值得信赖的：reliable
【小题4】ruins 固定词组成为废墟：in ruins
【小题5】eastern 形容词东方的：eastern
【小题6】 trapped 动词围困：trap；本句是被动语态，故使用过去分词的形式。
【小题7】gradually 副词逐渐的;graually
【小题8】reporter 名词记者：reporter.
【小题9】suffering 动词遭受：suffer;根据now说明本句是现在进行时。
【小题10】caves 名词洞穴：cave.根据主语Some animals说明使用复数形式。