【題目】1 think we'd better keep to the subject, ______we'll waste our time．

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

【答案】B

【解析】

試題分析：考查并列句中的并列連詞。A. 和；B. 否則，或者；C. 但是；D. 所以。句意：我想我們最好還是堅持這個主題，否則我們會浪費時間。這里前后兩句話不是并列關(guān)系，也不是轉(zhuǎn)折關(guān)系和因果關(guān)系，用“or”連接最合適，故選B。

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