–Steve! I haven’t seen you in weeks! What have you been up to?– a.I’ve been traveling a lot. In fact, I’ve been to three different cities in the past two weeks!b.Well, I’ve

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–Steve! I haven’t seen you in weeks! What have you been up to?
–

a.I’ve been traveling a lot. In fact, I’ve been to three different cities in the past two weeks!
b.Well, I’ve been studying for entrance exams for the past two months.
c.I’ve been writing an important letter this whole morning.

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综合英语（2）

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从创新发生的时期来看，可将其分为 A、系统初建期的创新 B、运行中的创新 C、局部创新 D、整体创新管理学原理

退休规划所做的投资应该倾向于盈利性。个人理财