So far, we           3000 English words.


  1. A.
    learned
  2. B.
    have learned
  3. C.
    studied
  4. D.
    learn
B
試題分析：句意：到目前為止，我們已經(jīng)學(xué)會了3000個英語單詞。結(jié)合語境可知本句描述的是現(xiàn)在已經(jīng)完成的動作，故用現(xiàn)在完成時態(tài)。選B。
考點(diǎn)：時態(tài)
點(diǎn)評：英語中的時態(tài)主要是借助于時間狀語與上下文語境來進(jìn)行判斷。解答此類題型，首先要注意句子中的時間狀語，如果沒有則要通過分析上下文，結(jié)合語境來判斷句子的時態(tài)。
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