【題目】I have so much homework to do today， I have to stay at home and do it．

A. but B. and C. so D. because

【答案】C

【解析】句意：我今天有如此多的家庭作業(yè)要做，因此我必須待在家里做作業(yè)。but但是，表示轉(zhuǎn)折；and和，而且，表示并列；so因此，所以，表示因果關(guān)系；because因?yàn)�，表示原因。根�?jù)句意可知，第一句話是原因，后面表示結(jié)果，故應(yīng)選C。

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