问题标题:
Theycarriedon------------thoughitwasdarkAworkBwithaworkCworkingDtowork
问题描述:
Theycarriedon------------thoughitwasdark
Awork
Bwithawork
Cworking
Dtowork
白成林回答:
选C,CARRYON的ON是介词,介词后用动词ing
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