题目内容
They______ have arrived at lunchtime but their flight was delayed.
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Will you read me a story, Mummy? --Ok. You _____ have one if you go to bed as soon as possible.
Shall I inform him of the change of the schedule right now?--I'm afraid you______ in case he comes late for the meeting.
篮球：在快速运动中突然急停时，手按拍球的上方。运球急起时，要迅速起动，手按拍球的后方。
Check valves never allow reverse flow through.
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