13．I usually take something to read when I travel by train        I feel bored．（　　）
A．in caseB．so thatC．as ifD．even though

分析 當(dāng)坐火車旅行的時(shí)候，以免無聊我通常會(huì)帶著一些讀物．

解答 答案：A．根據(jù)I feel bored可知我通常會(huì)帶著一些讀物的目的是以免無聊，所以答案是A in case"以免，以防"．其他選項(xiàng)的含義分別是B"以便于"，表示目的，肯定；C"好像"；D"即使"．

點(diǎn)評(píng) 考查從屬連詞．
in case萬一．是連詞，引導(dǎo)條件狀語從句．也就是說in case后面是一個(gè)完整的句子．
Take a hat with you in case the sun is very hot．倘若太陽很利害，你就把帽子戴上．
in case of的of是介詞，介詞后面只能帶名詞性質(zhì)的詞，比如名詞、代詞等．意思和in case差不多，萬一的意思．
In case of rain they can't go．萬一下雨，他們就不能去了．

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