Theworld____weliveismadeupofwater. A: atwhich B: inwhich C: onwhich D: ofwhich

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Inthe2008OlympicGamestheChineseteamwon100medals,51______weregold. A: ofwhich B: withwhich C: inwhich D: which

The tall tree,（） leaves are darker than those of the other two, is as old as grandpa. A: which B: whose C: ofwhich D: that