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keep的過去式

  He kept us at it all day.

  他讓我們不停地幹了一天。

  For reasons of security the door is always kept locked.

  為了保證安全,門總是鎖著的.。

  Dogs must be kept on a lead in the park.

  狗在公園裡必須繫著牽狗帶。

  The bills kept coming in, one after another.

  賬單紛至沓來。

  Next year's collection is still being kept under wraps.

  明年的時裝系列仍在保密之中。