14．Language experts claim that children _________ to the English-speaking environment will pick up English quickly．（　�。�
A．being exposedB．having been exposed
C．to be exposedD．exposed

分析 語(yǔ)言專家宣稱身處英語(yǔ)語(yǔ)言環(huán)境中的兒童會(huì)在不知不覺(jué)中快速學(xué)會(huì)英語(yǔ)．

解答 答案：D 句中expose作children的后置定語(yǔ)；expose sb to sth讓自己暴露在某物下，句中expose與children構(gòu)成動(dòng)賓關(guān)系，且句意表達(dá)的是客觀事實(shí)，要用表示被動(dòng)的過(guò)去分詞．故選D．

點(diǎn)評(píng) 過(guò)去分詞是非謂語(yǔ)動(dòng)詞的一種，用法很靈活，分為簡(jiǎn)單式done（表示與謂語(yǔ)同時(shí)或幾乎同時(shí)發(fā)生的動(dòng)作）；完成式having been done（表示先于謂語(yǔ)的動(dòng)作）．學(xué)習(xí)時(shí)，要把握其用法特征：表示被動(dòng)和完成．同時(shí)還要注意區(qū)分現(xiàn)在分詞和不定式．

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