firrst to say:
1. did I tell you that ......
2. have I tell you that ....
3. did you hear that
second to say:
1. By the way,
2. speak of ....,
3. that reminds that ....
React:
1. sounds perfect
2. that is cool
3. Great!
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1. really?
-------
1. ok 2. sure
3. that's fine！
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