Although they are separate, together they all add up to something.________________________，但结合起来后便产生了意义。
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这本书能给你用时就会通知你。You will be informed when this book is _____________________________.
与我的房间相比，苏珊的房间就像是宫殿一样。Susan’s room seemed like a palace ___________________mine.
所有的比赛都要根据规则来进行。All games should be played _________________________the rules.
静电场力是保守力还是非保守力？
A. 保守力
B. 非保守力
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