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2、简述在什么情况下可以读写ds1302数据流?

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用I had done或 I had been doing填空。 I invited Rachel to the party, but she couldn't come. She _________ (arrange) to do something else.

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用I had done或 I had been doing填空。 I offered Sue something to eat, but she wasn't hungry. She _____ just _______ (have) breakfast.

用I had done或 I had been doing填空。 A:"Was Paul at the party when you arrived?" "No, he __________(go) home."

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