So far, we           3000 English words.
A.learnedB.have learnedC.studiedD.learn
B

試題分析:句意:到目前為止,我們已經(jīng)學(xué)會(huì)了3000個(gè)英語(yǔ)單詞。結(jié)合語(yǔ)境可知本句描述的是現(xiàn)在已經(jīng)完成的動(dòng)作,故用現(xiàn)在完成時(shí)態(tài)。選B。
點(diǎn)評(píng):英語(yǔ)中的時(shí)態(tài)主要是借助于時(shí)間狀語(yǔ)與上下文語(yǔ)境來(lái)進(jìn)行判斷。解答此類(lèi)題型,首先要注意句子中的時(shí)間狀語(yǔ),如果沒(méi)有則要通過(guò)分析上下文,結(jié)合語(yǔ)境來(lái)判斷句子的時(shí)態(tài)。
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