19. While watching TV,      . 

A.    the doorbell rang

B.    the door rings

C.    we heard the doorbell ring

D.    we heard the doorbell rung

19.   C考査獨(dú)立主格結(jié)構(gòu)和非謂語動(dòng)詞。句意：在看電視的時(shí)候，我們聽到門鈴響了。此處watching TV的邏輯主語是we,再根據(jù)句意可知選C。

題目來源：2015全品語法快練高中英語新課標(biāo) > 訓(xùn)練21 非謂語動(dòng)詞和獨(dú)立主格

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