7．Travel is a very good activity．When traveling，you can relax（48）yourself．forget your tiredness or troubles，and have the energy to take on the new tasks waiting for you．
But sometimes traveling is not （49）anenjoyable thing．For example，the weather can be changeable．If you climb a mountain，it may rain suddenly．You may be caught （50）in the rain and may catch a cold．The（51）worstthing is that you may have your money stolen（52）oryou may have an injury．Ail these terrible things are（53）whatcan happen to you．
Therefore，when you are going on a trip，you must make a good preparation．Firstly，you must have clear information about the weather．（54）Secondly，you should choose a good companion so that you can help each other．Thirdly，you must be careful enough and try to avoid accidents．（55）Ifyou do this，you will surely enjoy your travel．

分析 本文是一篇說明文．文章介紹了旅行中應(yīng)該注意的幾件事情．

解答 48 yourself；49 an；50 in；51 worst；52 or；52 what；54 Secondly；55 If．
48 yourself．考查代詞的用法．根據(jù)后文的forget your tiredness or troubles 忘記你的疲勞或麻煩，可知，relax yourself 放松你自己．
49 an．考查不定冠詞．enjoyable thing在這里是泛指一件令人愉快的事情，因?yàn)閑njoyable是發(fā)音以元音音素開頭的單詞，所以前面用不定冠詞an修飾．故答案是an．
50 in．考查短語的用法．此處caught in the rain意為：遇到雨．
51 worst．考查最高級(jí)．句意是最糟糕的事情是可能錢被偷或者受傷，所以用形容詞bad的最高級(jí)worst，表示"最壞的，最糟糕的"．
52 or．考查并列連詞的用法．根據(jù)文意可知，錢被偷和受傷都是不幸的事，可能會(huì)有一種情況發(fā)生．故用or．
53 what．考查名詞性從句的連接詞．此處what作表語從句的主語．意為：所有不幸的事情都有可能發(fā)生在你的身上．
54 Secondly．考查副詞．前面講完了firstly，接著應(yīng)該講第二點(diǎn)了，所以用secondly．
55 If．考查狀語從句的連接詞．如果你這么做了，你就可以享受你的旅行了．

點(diǎn)評(píng) 這是一篇健康環(huán)保類閱讀．解答此類題目，首先要掌握文章大意，然后根據(jù)上下文語境及相關(guān)語法填寫正確的答案．

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