问题
选择题
SARS is an illness that can result in death unless left ______in time.
A．to treat
B．treating
C．treated
D．treat
答案
答案：C
选C。本句中的treat 充当主语补足语，且与主语SARS之间为被动关系，故应选择过去分词。
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SARS is an illness that can result in death unless left ______in time.
A．to treat
B．treating
C．treated
D．treat
答案：C
选C。本句中的treat 充当主语补足语，且与主语SARS之间为被动关系，故应选择过去分词。