——Excuse me, but could you please turn the radio down?
——Sorry, I _________ you could hear it.
A．don’t realizeB．haven’t realized
C．didn’t realizeD．hadn’t realized
C

試題分析：句意：打擾了，你能把收音機(jī)音量調(diào)小嗎?——抱歉，我不知道你能聽見。結(jié)合語(yǔ)境可知下文描述的是剛才發(fā)生的動(dòng)作，故用一般過(guò)去時(shí)態(tài)，選C。
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。解答此類題型，首先要注意句子中的時(shí)間狀語(yǔ)，如果沒有則要通過(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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