1.What is always filled when it is used and empty when at rest?2.What's the difference between a hill and a pill?3.What is yours, but is used more by others than by yourself?

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oes2.Ahillishardtogetupandapillishardtogetdown.在這里"getup"相當于"climb(登山)";"getdown"相當于"swallow(吞下)"。(這個我沒想出來,網上找來的...)3.Yourname