We must do something to protect the earth, ____we will lose our home.


  1. A.
    and
  2. B.
    or
  3. C.
    so
  4. D.
    but
B
試題分析：and和，并且；or或者，是否；so因此；but但是。句意：我們必須做點(diǎn)什么來保護(hù)地球，否則我們會失去我們的家園。結(jié)合語境可知選B。
考點(diǎn)：連詞辨析
點(diǎn)評：連詞在句子中主要起聯(lián)系上下文的作用，他們之間的區(qū)別就是表示邏輯關(guān)系的不同，所以在解題時(shí)先要理解上下文含義，然后根據(jù)上下文邏輯關(guān)系選擇合適的連詞。連詞的用法都比較多，語義之間還有交叉，熟記其基本應(yīng)用規(guī)則，了解其區(qū)別，注意固定搭配對象，是做好此類題型的關(guān)鍵。
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